Year	Dollars
1992-01-01	7409273
1997-01-01	4036421
2002-01-01	4868679
2003-01-01	10323554
2004-01-01	13006448
2005-01-01	20008837
2006-01-01	23663619
2007-01-01	25279806
2008-01-01	26826444
2009-01-01	17054550
2010-01-01	22437155
2011-01-01	21972955
2012-01-01	15623480
2013-01-01	17213534
2014-01-01	30582635
2015-01-01	42293415
2016-01-01	51535590