Year Dollars 1992-01-01 1790967 1997-01-01 4977960 2002-01-01 6787514 2003-01-01 5604393 2004-01-01 7301698 2005-01-01 7824184 2006-01-01 6161111 2007-01-01 7483656 2008-01-01 8120635 2009-01-01 9691591 2010-01-01 12176650 2011-01-01 13101723 2012-01-01 16777888 2013-01-01 18625874 2014-01-01 18128986 2015-01-01 13713778 2016-01-01 10253216