Year	Dollars
1997-01-01	9496519
2002-01-01	22778923
2003-01-01	9304868
2004-01-01	6665292
2005-01-01	3143786
2006-01-01	3678099
2007-01-01	7268727
2008-01-01	29958651
2009-01-01	3976321
2010-01-01	6692592
2011-01-01	7646870
2012-01-01	49808676
2014-01-01	22695976
2015-01-01	5492793
2016-01-01	1938797