Year	Dollars
1992-01-01	5515687994
1997-01-01	10809466739
2002-01-01	13755066564
2003-01-01	14942474579
2004-01-01	17426462775
2005-01-01	19502114441
2006-01-01	20984316396
2007-01-01	24356919495
2008-01-01	24542789475
2009-01-01	21326881653
2010-01-01	26744101875
2011-01-01	29475844869
2012-01-01	32248912602
2013-01-01	32026559743
2014-01-01	33124010435
2015-01-01	31744157868
2016-01-01	31993980823