Year	Dollars
1997-01-01	15727933
2002-01-01	10917534
2003-01-01	14217903
2004-01-01	17186607
2005-01-01	16811322
2006-01-01	16011752
2007-01-01	18159631
2008-01-01	21198016
2009-01-01	15932887
2010-01-01	24888880
2011-01-01	39966853
2012-01-01	51437184
2013-01-01	39774967
2014-01-01	44863028
2015-01-01	55256899
2016-01-01	61835232