Klingenstein Foundation

EIN 13-6077894 • New Canaan, CT

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55 Wellesley DriveNew Canaan, CT 06840

Siviq Scores

Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.

0.00x

Tied with the lowest-debt nonprofits in its peer group.

$500k-$1M nonprofits • Source year 2024

0.00x

Tied with the lowest-debt nonprofits in its peer group.

$500k-$1M nonprofits • Source year 2024

-8.5%

Higher net margin than 29% of similar nonprofits.

$500k-$1M nonprofits • Source year 2024

Higher top officer pay than 70% of similar nonprofits.

Top officer pay equals 0.0% of source-year revenue.

$500k-$1M nonprofits • Source year 2024

-15%

Faster asset growth than 13% of similar nonprofits.

$500k-$1M nonprofits • Annualized from 2022 to 2024

No value available

A valid growth rate could not be computed from the available filing history.

Annualized from 2022 to 2024

Balance Sheet

Liabilities / Assets39th percentile

Assets

Down

$877,087

Down $342,471 (-28%) from 2022

Liabilities

Flat

Flat from 2022

Net Assets

Down

$877,087

Down $342,471 (-28%) from 2022

Operations

Liabilities / Revenue40th percentile Net Margin29th percentile

Revenue

$73,362

Up $248,353 (+142%) from 2022

Expenses

$79,597

Up $28,010 (+54%) from 2022

Net Income

-$6,235

Up $220,343 (+97%) from 2022

Trend Graphs

Balance Sheet Trend

Asset Growth13th percentile

Grouped bars show assets, liabilities, and net assets across loaded filings.

Highlighted filing

2024

Assets$877,087

Liabilities$0

Net Assets$877,087

Open 2024 Filing

Operations Trend

Revenue GrowthScore unavailable

Revenue, expenses, and net income by year, with the latest filing highlighted.

Highlighted filing

2024

Revenue$73,362

Expenses$79,597

Net Income-$6,235

Open 2024 Filing

Filings

Most recent year

2024 • Form 990PFDetailed filing. Detailed filing data is available for this year.

Open filing

Assets: $877,087
Liabilities: $0
Net assets: $877,087
Revenue: $73,362
Expenses: $79,597
Net income: -$6,235

	Balance Sheet			Operations
Year	Assets	Liabilities	Net Assets	Revenue	Expenses	Net Income
2024Detailed filing. Detailed filing data is available for this year.	$0.88	$0.00	$0.88	$0.07	$0.08	$0.01
2022Detailed filing. Detailed filing data is available for this year.	$1.22	$0.00	$1.22	$0.17	$0.05	$0.23
2021Detailed filing. Detailed filing data is available for this year.	$1.71	$0.00	$1.71	$0.06	$0.03	$0.04
2020Detailed filing. Detailed filing data is available for this year.	$1.90	$0.00	$1.90	$0.09	$0.16	$0.06
2019Detailed filing. Detailed filing data is available for this year.	$1.97	$0.00	$1.97	$0.09	$0.15	$0.06
2018Detailed filing. Detailed filing data is available for this year.	$2.03	$0.00	$2.03	$0.12	$0.21	$0.08
2016Detailed filing. Detailed filing data is available for this year.	$2.28	$0.00	$2.28	$0.02	$1.25	$1.23
2015Detailed filing. Detailed filing data is available for this year.	$3.51	$0.00	$3.51	$0.03	$0.27	$0.24
2014Summary only. Only limited summary data is available for this year.	$3.76	$0.00		$1.50	$0.37	$1.12
2013Detailed filing. Detailed filing data is available for this year.	$3.20	$0.00	$3.20	$0.48	$0.38	$0.10
2012Detailed filing. Detailed filing data is available for this year.	$3.22	$0.00	$3.22		$0.27
2011Detailed filing. Detailed filing data is available for this year.	$3.51	$0.00	$3.51		$0.25

Latest Filing Detail

Jump To

Filing Snapshot

Filing Period: Jan 1, 2024 to Dec 31, 2024
Signed: Nov 15, 2025
Return Version: 2024v5.2

Compensation and Service Providers

Top Officer Pay70th percentile

Employees

Name	Title	Full / Part Time	Base	Other	Total
JOANNE K ZIESING	President/Director	-	$0	-	-
PETER ZIESING	Treasuer/Director	-	$0	-	-

Filing and Contact Details

Filer

Filer Name: Klingenstein Foundation
EIN: 13-6077894
Phone: 2039628589
Address: 55 WELLESLEY DRIVE, NEW CANAAN, CT 06840

Signing Officer

Name: Joanne K Ziesing
Title: President
Phone: 2126971000
Signed: 2025-11-15
Discuss with paid preparer: Yes

Preparer

Firm: Cbiz Advisors LLC
Address: 35 MASON STREET, GREENWICH, CT 06830
Preparer: Alexander Kotwal
Phone: 2036813100

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IRS990PF/StatementsRegardingActyGrp/MoreThan100SpentInd	0	0
IRS990PF/StatementsRegardingActyGrp/NewSubstantialContributorsInd	0	0
IRS990PF/StatementsRegardingActyGrp/OrganizationDissolvedEtcInd	0	0
IRS990PF/StatementsRegardingActyGrp/OrgReportOrRegisterStateCd	0	NY
IRS990PF/StatementsRegardingActyGrp/OwnControlledEntityInd	0	0
IRS990PF/StatementsRegardingActyGrp/PhoneNum	0	2039628589
IRS990PF/StatementsRegardingActyGrp/PrivateOperatingFoundationInd	0	0
IRS990PF/StatementsRegardingActyGrp/Section4955ManagersTaxAmt	0	0
IRS990PF/StatementsRegardingActyGrp/Section4955OrganizationTaxAmt	0	0
IRS990PF/StatementsRegardingActyGrp/Section508eRqrSatisfiedInd	0	1
IRS990PF/StatementsRegardingActyGrp/TaxReimbursedAmt	0	0
IRS990PF/StatementsRegardingActyGrp/UnrelatedBusIncmOverLimitInd	0	1
IRS990PF/StatementsRegardingActyGrp/WebsiteAddressTxt	0	N/A
IRS990PF/SumOfProgramRelatedInvstGrp/TotalAmt	0	0
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/Amt	0	25000
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/Amt	1	5500
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/Amt	2	500
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/Amt	3	250
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/Amt	4	250
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/Amt	5	25000
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/Amt	6	250
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/Amt	7	100
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/GrantOrContributionPurposeTxt	0	SUPPORT OF ORGANIZATION
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/GrantOrContributionPurposeTxt	1	SUPPORT OF ORGANIZATION
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/GrantOrContributionPurposeTxt	2	SUPPORT OF ORGANIZATION
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/GrantOrContributionPurposeTxt	3	SUPPORT OF ORGANIZATION
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/GrantOrContributionPurposeTxt	4	SUPPORT OF ORGANIZATION
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/GrantOrContributionPurposeTxt	5	SUPPORT OF ORGANIZATION
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/GrantOrContributionPurposeTxt	6	SUPPORT OF ORGANIZATION
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/GrantOrContributionPurposeTxt	7	SUPPORT OF ORGANIZATION
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientBusinessName/BusinessNameLine1Txt	0	SCHWAB CHARITABLE FUND
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientBusinessName/BusinessNameLine1Txt	1	THE NEW YORK HISTORICAL SOCIETY
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientBusinessName/BusinessNameLine1Txt	2	NATIONAL PUBLIC RADIO (NPR)
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientBusinessName/BusinessNameLine1Txt	3	SCARSDALE AMBULANCE
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientBusinessName/BusinessNameLine1Txt	4	WCLA - CHOICE MATTERS
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientBusinessName/BusinessNameLine1Txt	5	VANGUARD CHARITABLE
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientBusinessName/BusinessNameLine1Txt	6	AMERICAN CIVIL LIBERTIES UNION (ACLU)
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientBusinessName/BusinessNameLine1Txt	7	SCARSDALE POLICE BENEVOLENT ASSOCIATE
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientFoundationStatusTxt	0	PUBLIC
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientFoundationStatusTxt	1	PUBLIC
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientFoundationStatusTxt	2	PUBLIC
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientFoundationStatusTxt	3	PUBLIC
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientFoundationStatusTxt	4	PUBLIC
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientFoundationStatusTxt	5	PUBLIC
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientFoundationStatusTxt	6	PUBLIC
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientFoundationStatusTxt	7	PUBLIC
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt	0	9800 SCHWAB WAY
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt	1	170 CENTRAL PARK W
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt	2	PO BOX 791490
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt	3	5 WEAVER ST
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt	4	PO BOX 1175
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt	5	PO BOX 9509
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt	6	125 BROAD ST
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt	7	50 TOMPKINS ROAD
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm	0	LONE TREE
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm	1	NEW YORK
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm	2	BALTIMORE
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm	3	SCARSDALE
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm	4	WHITE PLAINS
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm	5	WARWICK
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm	6	NEW YORK
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm	7	SCARSDALE
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd	0	CO
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd	1	NY
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd	2	MD
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd	3	NY
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd	4	NY
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd	5	RI
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd	6	NY
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd	7	NY
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd	0	80124
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd	1	10024
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd	2	212791490
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd	3	10583
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd	4	10602
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd	5	028899509
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd	6	10004
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd	7	10583
IRS990PF/SupplementaryInformationGrp/OnlyContriToPreselectedInd	0	X
IRS990PF/SupplementaryInformationGrp/TotalGrantOrContriApprvFutAmt	0	0
IRS990PF/SupplementaryInformationGrp/TotalGrantOrContriPdDurYrAmt	0	56850
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/LoansOrLoanGuaranteesInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/PerformanceOfServicesEtcInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/PurchaseOfAssetsNonchrtblEOInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/ReimbursementArrangementsInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/RelationshipsNonchrtblEOInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/RentalOfFacilitiesOthAssetsInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/SalesOrExchangesOfAssetsInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/SharingOfFacilitiesEtcInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/TrnsfrOfCashToNonchrtblEOInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/TrnsfrOtherAssetNonchrtblEOInd	0	0
IRS990PF/UndistributedIncomeGrp/AppliedToCurrentYearAmt	0	24781
IRS990PF/UndistributedIncomeGrp/AppliedToPriorYearsAmt	0	0
IRS990PF/UndistributedIncomeGrp/AppliedToYear1Amt	0	0
IRS990PF/UndistributedIncomeGrp/CorpusDistri170b1EOr4942g3Amt	0	0
IRS990PF/UndistributedIncomeGrp/DistributableAsAdjustedAmt	0	24781
IRS990PF/UndistributedIncomeGrp/ExcessDistributionCyovAppCYAmt	0	0
IRS990PF/UndistributedIncomeGrp/ExcessDistributionCyovYr1Amt	0	286435
IRS990PF/UndistributedIncomeGrp/ExcessDistributionCyovYr4Amt	0	57404
IRS990PF/UndistributedIncomeGrp/ExcessDistributionCyovYr5Amt	0	25582
IRS990PF/UndistributedIncomeGrp/ExcessDistriCyovAppCYCorpusAmt	0	0
IRS990PF/UndistributedIncomeGrp/ExcessDistriCyovFromYr5Amt	0	25582
IRS990PF/UndistributedIncomeGrp/ExcessDistriCyovToNextYrAmt	0	375908
IRS990PF/UndistributedIncomeGrp/ExcessFromCurrentYearAmt	0	32069
IRS990PF/UndistributedIncomeGrp/ExcessFromYear1Amt	0	286435
IRS990PF/UndistributedIncomeGrp/ExcessFromYear4Amt	0	57404
IRS990PF/UndistributedIncomeGrp/PriorYearDeficiencyOrTaxAmt	0	0
IRS990PF/UndistributedIncomeGrp/PriorYearUndistributedIncmAmt	0	0
IRS990PF/UndistributedIncomeGrp/QualifyingDistributionsAmt	0	56850
IRS990PF/UndistributedIncomeGrp/RemainingDistriFromCorpusAmt	0	32069
IRS990PF/UndistributedIncomeGrp/Taxable1Amt	0	0
IRS990PF/UndistributedIncomeGrp/Taxable2Amt	0	0
IRS990PF/UndistributedIncomeGrp/TotalCorpusAmt	0	401490
IRS990PF/UndistributedIncomeGrp/TotalExcessDistributionCyovAmt	0	369421
IRS990PF/UndistributedIncomeGrp/TotalForPriorYearsAmt	0	0
IRS990PF/UndistributedIncomeGrp/TreatedAsDistriFromCorpusAmt	0	0
IRS990PF/UndistributedIncomeGrp/UndistributedIncomeCYAmt	0	0
IRS990PF/UndistributedIncomeGrp/UndistributedIncomePYAmt	0	0
OtherExpensesSchedule/OtherExpensesScheduleGrp/Desc	0	OTHER EXPENSES - COLUMBINE FAMILY LLC
OtherExpensesSchedule/OtherExpensesScheduleGrp/Desc	1	BANK FEES
OtherExpensesSchedule/OtherExpensesScheduleGrp/DisbursementsCharitablePrpsAmt	0	0
OtherExpensesSchedule/OtherExpensesScheduleGrp/DisbursementsCharitablePrpsAmt	1	0
OtherExpensesSchedule/OtherExpensesScheduleGrp/NetInvestmentIncomeAmt	0	0
OtherExpensesSchedule/OtherExpensesScheduleGrp/NetInvestmentIncomeAmt	1	0
OtherExpensesSchedule/OtherExpensesScheduleGrp/RevenueAndExpensesPerBooksAmt	0	5063
OtherExpensesSchedule/OtherExpensesScheduleGrp/RevenueAndExpensesPerBooksAmt	1	25
TaxesSchedule/TaxesDetail/Amt	0	336
TaxesSchedule/TaxesDetail/Amt	1	250
TaxesSchedule/TaxesDetail/CategoryTxt	0	FOREIGN TAXES - COLUMBINE
TaxesSchedule/TaxesDetail/CategoryTxt	1	NYS FILING FEES
TaxesSchedule/TaxesDetail/DisbursementsCharitablePrpsAmt	0	0
TaxesSchedule/TaxesDetail/DisbursementsCharitablePrpsAmt	1	0
TaxesSchedule/TaxesDetail/NetInvestmentIncomeAmt	0	336
TaxesSchedule/TaxesDetail/NetInvestmentIncomeAmt	1	0
ReturnHeader/BuildTS	0	2025-03-06 01:10:19Z
ReturnHeader/BusinessOfficerGrp/DiscussWithPaidPreparerInd	0	1
ReturnHeader/BusinessOfficerGrp/PersonNm	0	JOANNE K ZIESING
ReturnHeader/BusinessOfficerGrp/PersonTitleTxt	0	PRESIDENT
ReturnHeader/BusinessOfficerGrp/PhoneNum	0	2126971000
ReturnHeader/BusinessOfficerGrp/SignatureDt	0	2025-11-15
ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt	0	KLINGENSTEIN FOUNDATION
ReturnHeader/Filer/BusinessNameControlTxt	0	KLIN
ReturnHeader/Filer/EIN	0	136077894
ReturnHeader/Filer/PhoneNum	0	2039628589
ReturnHeader/Filer/USAddress/AddressLine1Txt	0	55 WELLESLEY DRIVE
ReturnHeader/Filer/USAddress/CityNm	0	NEW CANAAN
ReturnHeader/Filer/USAddress/StateAbbreviationCd	0	CT
ReturnHeader/Filer/USAddress/ZIPCd	0	06840
ReturnHeader/IRSResponsiblePrtyInfoCurrInd	0	0
ReturnHeader/PreparerFirmGrp/PreparerFirmEIN	0	881478669
ReturnHeader/PreparerFirmGrp/PreparerFirmName/BusinessNameLine1Txt	0	CBIZ ADVISORS LLC
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/AddressLine1Txt	0	35 MASON STREET
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/CityNm	0	GREENWICH
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/StateAbbreviationCd	0	CT
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/ZIPCd	0	06830
ReturnHeader/PreparerPersonGrp/PhoneNum	0	2036813100
ReturnHeader/PreparerPersonGrp/PreparationDt	0	2025-11-10
ReturnHeader/PreparerPersonGrp/PreparerPersonNm	0	ALEXANDER KOTWAL
ReturnHeader/ReturnTs	0	2025-11-11T07:59:57-06:00
ReturnHeader/ReturnTypeCd	0	990PF
ReturnHeader/TaxPeriodBeginDt	0	2024-01-01
ReturnHeader/TaxPeriodEndDt	0	2024-12-31
ReturnHeader/TaxYr	0	2024