Year Dollars 1992-01-01 3603253 1997-01-01 6365096 2002-01-01 9175109 2003-01-01 10178207 2004-01-01 11636618 2005-01-01 17702706 2006-01-01 16622392 2007-01-01 17552859 2008-01-01 22233314 2009-01-01 18523397 2010-01-01 23451877 2011-01-01 28721767 2012-01-01 23875070 2013-01-01 58185535 2014-01-01 25212975 2015-01-01 25300745 2016-01-01 29633670