Why is no U.S. federal census available since 1930?

Question:

Why is no U.S. federal census available since 1930?

Best Answer - Chosen by Asker: Privacy issues - info. can't be released for 72 years. We will all just have to wait until April Fool's Day of 2012. (well, maybe not, if your read the press release below)

(from a press release at the site cited below)

There are 1639 days remaining until Sunday, April 1, 2012.

The official date for the 1940 Census was April 1st, but since that day will fall on a Sunday in 2012, it is unclear whether reseachers will have weekend access to film at the National Archives or will instead need to wait until Monday, April 2nd to satisfy their genealogical curiosity.
Source: http://www.1940census.net/ That's the latest that federal law will allow. It's federal law. And believe me, every serious, experienced genealogist you hear from on this board is waiting anxiously for the release in 2012. Only thing worse is the lost 1890 census - which if you didn't know, was destroyed by a fire at the Commerce Building in 1921 before anyone got to see it and record anything from it. It was still sequestered when it was destroyed. Privacy. It is no body's business how much your parents paid for rent in 1940, or who was living with who, until they die. Then we all find out the juicy stuff.