Year Dollars 1992-01-01 17354246 1997-01-01 30774991 2002-01-01 36751434 2003-01-01 47956262 2004-01-01 45638832 2005-01-01 49474328 2006-01-01 40999041 2007-01-01 43243222 2008-01-01 34083134 2009-01-01 25200092 2010-01-01 38672414 2011-01-01 32492886 2012-01-01 27736303 2013-01-01 38929971 2014-01-01 40020585 2015-01-01 42957668 2016-01-01 43224389