Year Dollars 1992-01-01 1669726 1997-01-01 1714470 2002-01-01 1999190 2003-01-01 1684320 2004-01-01 3898774 2005-01-01 3387152 2006-01-01 21203430 2007-01-01 12651630 2008-01-01 7908318 2009-01-01 6926745 2010-01-01 8477484 2011-01-01 21776212 2012-01-01 23320555 2013-01-01 27437690 2014-01-01 21366045 2015-01-01 20392308 2016-01-01 41868578