Year Dollars 1997-01-01 717232 2003-01-01 1008223 2007-01-01 4899469 2008-01-01 6707284 2009-01-01 1490835 2010-01-01 7794426 2011-01-01 8123869 2012-01-01 7048139 2013-01-01 4178768 2014-01-01 5093739 2015-01-01 4631500 2016-01-01 4459480