Year	Dollars
1997-01-01	17092981
2002-01-01	17238881
2003-01-01	29766511
2004-01-01	30057078
2005-01-01	40990694
2006-01-01	51839866
2007-01-01	65947293
2008-01-01	117950834
2009-01-01	238340179
2010-01-01	238526488
2011-01-01	285678967
2012-01-01	285476695
2013-01-01	304343333
2014-01-01	283661612
2015-01-01	234570442
2016-01-01	317056357