Year Dollars 1992-01-01 4616225 1997-01-01 14837149 2002-01-01 13442012 2003-01-01 14554158 2004-01-01 13706007 2005-01-01 34256629 2006-01-01 24635412 2007-01-01 156782205 2008-01-01 102645976 2009-01-01 23521193 2010-01-01 59555079 2011-01-01 52556112 2012-01-01 44474838 2013-01-01 29688038 2014-01-01 22714534 2015-01-01 22779384 2016-01-01 22739753