Year	Dollars
1992-01-01	3305135639
1997-01-01	5153574486
2002-01-01	9347226206
2003-01-01	11526558437
2004-01-01	12648305411
2005-01-01	13112753481
2006-01-01	15018248582
2007-01-01	17722672406
2008-01-01	19519628856
2009-01-01	20788151123
2010-01-01	22625215633
2011-01-01	18039193363
2012-01-01	18508699347
2013-01-01	19721350817
2014-01-01	20061170247
2015-01-01	20177823474
2016-01-01	19769730277