The U.S. Labor Department's website includes a database that shows $5,159,629,434 in improper unemployment insurance payments for all 50 states, U.S. territories and the District of Columbia for the period July 1, 2011 to June 30, 2012.

The database also shows that 2.85 percent, or $1.28 billion, of the total unemployment insurance payments ($45.2 billion) in that timeframe were the result of fraud.  (See here and click on XLS sheet for “2012 Calendar Year data.”)