Year Dollars 1997-01-01 1459999 2002-01-01 2493718 2003-01-01 1730950 2004-01-01 2532491 2005-01-01 1580206 2006-01-01 3797749 2007-01-01 2866254 2008-01-01 3526442 2009-01-01 4175824 2010-01-01 3606062 2011-01-01 5077946 2012-01-01 10479107 2013-01-01 11278289 2014-01-01 9279285 2015-01-01 10145085 2016-01-01 15193844