Year	Dollars
1997-01-01	2224605
2002-01-01	1620199
2003-01-01	1478952
2004-01-01	1884234
2005-01-01	3147725
2006-01-01	5881758
2007-01-01	15412422
2008-01-01	12850082
2009-01-01	16851143
2010-01-01	26107327
2011-01-01	39455622
2012-01-01	48589973
2013-01-01	24729819
2014-01-01	14505784
2015-01-01	26157418
2016-01-01	28808355