Year Dollars 1997-01-01 249367 2002-01-01 884859 2003-01-01 986442 2004-01-01 693882 2005-01-01 3410473 2006-01-01 3810141 2007-01-01 6304451 2008-01-01 9567728 2009-01-01 7581714 2010-01-01 10459796 2011-01-01 14791786 2012-01-01 20066601 2013-01-01 6817528 2014-01-01 5708495 2015-01-01 10010389 2016-01-01 4827861