Year	Dollars
1997-01-01	454314
2002-01-01	938321
2003-01-01	6454494
2004-01-01	887819
2005-01-01	624721
2006-01-01	679028
2007-01-01	1408803
2008-01-01	5171841
2011-01-01	11455459
2012-01-01	6604512
2013-01-01	27510738
2014-01-01	11263529
2015-01-01	21740066