Year Dollars 1992-01-01 3249309 1997-01-01 8734494 2002-01-01 8922101 2003-01-01 10305023 2004-01-01 9805018 2005-01-01 12929588 2006-01-01 18649867 2007-01-01 21615644 2008-01-01 25080701 2009-01-01 16442155 2010-01-01 21625846 2011-01-01 28128090 2012-01-01 33618532 2013-01-01 32968900 2014-01-01 27495456 2015-01-01 35479973 2016-01-01 28846224