Year	Dollars
1997-01-01	3296827
2002-01-01	10499740
2003-01-01	12459229
2004-01-01	13114116
2005-01-01	11058622
2006-01-01	14437235
2007-01-01	15226920
2008-01-01	9038616
2009-01-01	10677772
2010-01-01	6591311
2011-01-01	5222901
2012-01-01	8551416
2013-01-01	21385161
2014-01-01	33973280
2015-01-01	30635836
2016-01-01	35408093