Year	Dollars
1992-01-01	3420129338
1997-01-01	9310911700
2002-01-01	14708495350
2003-01-01	13283780791
2004-01-01	15376218684
2005-01-01	15921206261
2006-01-01	17707642542
2007-01-01	17000627546
2008-01-01	19246896055
2009-01-01	16365463989
2010-01-01	19715725965
2011-01-01	24561418371
2012-01-01	25115993275
2013-01-01	22516501805
2014-01-01	23948879548