Year Dollars 1997-01-01 396312 2002-01-01 1240484 2003-01-01 1747596 2004-01-01 3542090 2005-01-01 2672347 2006-01-01 2834607 2007-01-01 2193028 2008-01-01 3630234 2009-01-01 3887366 2010-01-01 3406561 2011-01-01 4835962 2012-01-01 6886356 2013-01-01 5309186 2014-01-01 5773937 2015-01-01 6372603 2016-01-01 8363020