Year	Dollars
1992-01-01	7699023637
1997-01-01	12432862418
2002-01-01	14084017341
2003-01-01	14247900951
2004-01-01	16625061285
2005-01-01	18317670218
2006-01-01	24131353596
2007-01-01	26739448028
2008-01-01	30566628892
2009-01-01	23972984594
2010-01-01	28008867102
2011-01-01	33328027759
2012-01-01	32740647979
2013-01-01	32314567760
2014-01-01	32082651468
2015-01-01	28197465385
2016-01-01	27411078830