Year Dollars 1997-01-01 2528913 2003-01-01 487103 2005-01-01 2103954 2006-01-01 1758660 2007-01-01 2800276 2008-01-01 3506761 2009-01-01 1277773 2010-01-01 2328275 2011-01-01 1953589 2012-01-01 3856672 2013-01-01 1877988 2014-01-01 3144308 2015-01-01 2123706 2016-01-01 4967006