Year Dollars 1992-01-01 421912 1997-01-01 1515056 2004-01-01 657634 2006-01-01 2385319 2007-01-01 114740900 2010-01-01 10240109 2011-01-01 33863966 2012-01-01 15006317 2013-01-01 10976415