2. Version 2 of this file was placed on this server on Thursday, January 22, 2004 due to an error found in the veterans weight.

4. The Tenure items (HETENURE, HXTENURE) are available in MDAT (formerly DataFerrett), and are updated only in the months of January, April, July, and October for the previous quarter. Basic CPS files on the CPS site do not include Tenure items. Users must obtain them via MDAT (formerly DataFerrett) and append them appropriately. Tenure items are included on all of the CPS supplement files on the CPS site.

5. The January 2005 files were replaced (May 20, 2005).

6 This file contains a second set of weights to be used in conjunction with the December 2007 original public use file. These weights are controlled to population estimates consistent with the new set of controls introduced in January 2008.

7. The May 2008 data files were replaced (Aug. 4, 2008).

8. The Nov and Dec 2009 data files were replaced to correct the values in HETELHHD, HETELAVL, and HEPHONEO (Jan. 28, 2010).

9. June 10, 2010 - Issue discovered with microdata files for the period from August 2002 through December 2010.  In August 2002 an age-masking method was introduced in the creation of the CPS public use microdata files.  Inconsistent male/female sex ratios for people 65 and over resulted. The age-masking algorithm was changed effective with the January 2011 public use files, to produce random rather than systematic results. Microdata files 2002 - 2010 were not replaced.

10. May 18, 2011 - The January, February, and March 2011 basic CPS microdata are now available. A new age swapping procedure, implemented in January 2011, protects the confidentiality of individuals in sample.

11. Feb 17, 2012 - We are no longer providing the standard Unix compression type. Most current Unix/Linux machines have zip or gzip utilities.

12. April 3, 2012 - These files were replaced. Please see the User Note for a full explanation.

13. April 3, 2012 - These files were replaced. Please see the User Note for a full explanation.

14. January 11, 2013 - This note applies to all files collected in January 2011 and later. Please see the User Note for a full explanation.

15. September, 24, 2020 - This note applies to Basic CPS files from January 2020 through July 2020. Please see the User Note for a full explanation.

16. March 2021 - The following variables had their prefixes changed from 'PE' or 'PR' to 'PT' in order to reflect that they are top-coded: PTIO1OCD, PTIO2OCD, PTERNHLY, PTERNWA, PTERN2, & PTERNH1C.

17. August 2021 - The 2020 files were corrected for the Paid and Number of Employees variables:  PEPDEMP1, PEPDEMP2, PXPDEMP1, PXPDEMP2, PTNMEMP1, PTNMEMP2, PXNMEMP1, PXNMEMP2.

18. January 2023 - New Privacy Disclosure methods have been applied mainly affecting geography and earnings reporting.   Please see the User Note for a full explanation.