Year	Dollars
1992-01-01	4979045
1997-01-01	10270602
2002-01-01	8941020
2003-01-01	12815279
2004-01-01	6885618
2005-01-01	14368012
2006-01-01	5702795
2007-01-01	4692784
2008-01-01	6422315
2009-01-01	11274451
2010-01-01	17439888
2011-01-01	33996933
2012-01-01	26716599
2013-01-01	22487161
2014-01-01	26981153
2015-01-01	28817516
2016-01-01	21788520