Year Dollars 1992-01-01 3048985 1997-01-01 6089449 2002-01-01 9319197 2003-01-01 9366863 2004-01-01 10704233 2005-01-01 21626807 2006-01-01 28001056 2007-01-01 20373866 2008-01-01 25664893 2009-01-01 23836326 2010-01-01 23145024 2011-01-01 23383307 2012-01-01 21066500 2013-01-01 25972678 2014-01-01 26074874 2015-01-01 28916342 2016-01-01 35070686