Year Dollars 1992-01-01 3233093 1997-01-01 10299102 2002-01-01 1857888 2003-01-01 2004146 2004-01-01 4950936 2005-01-01 2728593 2006-01-01 4265263 2007-01-01 4107528 2008-01-01 7050682 2009-01-01 9003289 2010-01-01 13289739 2011-01-01 22072450 2012-01-01 27967741 2013-01-01 30338339 2014-01-01 41519928 2015-01-01 32981984 2016-01-01 31033899