# Does IPUMS-USA revise ACS perwt after it's released?

**URL:** https://forum.ipums.org/t/does-ipums-usa-revise-acs-perwt-after-its-released/1088
**Category:** USA
**Created:** [October 22, 2015, 8:24pm UTC](https://forum.ipums.org/t/does-ipums-usa-revise-acs-perwt-after-its-released/1088 "2015-10-22T20:24:00Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![ty2317](https://avatars.discourse-cdn.com/v4/letter/t/e480ec/32.png) [@ty2317](https://forum.ipums.org/u/ty2317)
#### Post date: [October 22, 2015, 8:24pm UTC](https://forum.ipums.org/t/does-ipums-usa-revise-acs-perwt-after-its-released/1088/1 "2015-10-22T20:24:00Z")

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I’m trying to replicate state-level population counts that I estimated with your ACS samples in the past but can’t match the data. How common is it that IPUMS-USA updates perwt after it’s released?