Year Dollars 1997-01-01 39537 2005-01-01 65321 2006-01-01 80669 2007-01-01 75077 2008-01-01 907255 2011-01-01 227112 2012-01-01 324935 2013-01-01 279171 2014-01-01 231641 2015-01-01 469251