JohnK
Tuesday, March 18, 2014 2:17:30 AM
How often does USCIS release their data?
Amazon
Tuesday, March 18, 2014 2:54:16 AM
You havent mention which data. Different data are released at different times. Here are few examples:

EB Demand data which is one of the documents used for crating visa bulletin is typically released once a month. Sometimes they only release it once a month.

Visa Bulletin is released once a month.

USCIS Processing time is typically updated once a month. However is there is no change, they may not update it every month.

Annual fiscal year data is released once a year. This includes summary of all visas assigned. Further reports includes visas assigned by country, category, etc. This gives a good idea of total visas assigned per countr fo reach category.

For actual processing time of application, you can checkout the GC tracker. It will give you a latest data and which may be different from the time posted on USCIS website.
Please remember to add your case to the GC tracker: http://www.mygcvisa.com/tracker 
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