# Limited data sets for use with online data analylsis system?

**URL:** <https://forum.ipums.org/t/limited-data-sets-for-use-with-online-data-analylsis-system/3514>\
**Category:** USA\
**Created:** [May 9, 2020, 5:51pm UTC](https://forum.ipums.org/t/limited-data-sets-for-use-with-online-data-analylsis-system/3514 "2020-05-09T17:51:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Blake\_Gumprecht](https://avatars.discourse-cdn.com/v4/letter/b/b487fb/32.png) [@Blake\_Gumprecht](https://forum.ipums.org/u/Blake_Gumprecht)\
**Post date:** [May 9, 2020, 5:51pm UTC](https://forum.ipums.org/t/limited-data-sets-for-use-with-online-data-analylsis-system/3514/1 "2020-05-09T17:51:55Z")

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Hi all,

I’m new to IPUMS. Can someone explain to me why only a limited number of datasets are available for use with the online data analysis system?

Thanks,

Blake

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**Author:** ![Matthew\_Bombyk](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@Matthew\_Bombyk](https://forum.ipums.org/u/Matthew_Bombyk)\
**Post date:** [May 11, 2020, 8:45pm UTC](https://forum.ipums.org/t/limited-data-sets-for-use-with-online-data-analylsis-system/3514/2 "2020-05-11T20:45:37Z")

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There is one sample for every decennial census or ACS year from 1850 to the present in SDA. If you’re interested in a different sample for a given year you may access it through the [extract system](https://usa.ipums.org/usa-action/variables/group).