Year	Dollars
1992-01-01	4317987494
1997-01-01	7983941334
2002-01-01	10625445123
2003-01-01	11412121809
2004-01-01	14576258148
2005-01-01	17551765333
2006-01-01	20503698770
2007-01-01	20071481087
2008-01-01	21410165130
2009-01-01	19119737353
2010-01-01	24308226263
2011-01-01	28064447944
2012-01-01	29002289018
2013-01-01	30183732003
2014-01-01	31058485004
2015-01-01	30446700640
2016-01-01	29460558095