Year	Dollars
1992-01-01	6630681
1997-01-01	13462382
2002-01-01	9082122
2003-01-01	11562743
2004-01-01	23709912
2005-01-01	25551376
2006-01-01	42191576
2007-01-01	63307788
2008-01-01	129515439
2009-01-01	162265199
2010-01-01	129374074
2011-01-01	178284786
2012-01-01	226374961
2013-01-01	255141042
2014-01-01	261596165
2015-01-01	186602020
2016-01-01	80121329