Year	Dollars
1992-01-01	3550149676
1997-01-01	6542747348
2002-01-01	8906686629
2003-01-01	11065806512
2004-01-01	12454957275
2005-01-01	13197183489
2006-01-01	12792634177
2007-01-01	15662328664
2008-01-01	18665505166
2009-01-01	15756876794
2010-01-01	19362224776
2011-01-01	23442507207
2012-01-01	23819793259
2013-01-01	25139003891
2014-01-01	28190181743
2015-01-01	29415835771
2016-01-01	29558604842