Year Dollars 1992-01-01 11333963 1997-01-01 6675235 2002-01-01 9226972 2003-01-01 8636730 2004-01-01 9570834 2005-01-01 11739258 2006-01-01 28507199 2007-01-01 35936044 2008-01-01 11399577 2009-01-01 17695538 2010-01-01 20380841 2011-01-01 17634996 2012-01-01 16435175 2013-01-01 13496676 2014-01-01 12793328 2015-01-01 13651838 2016-01-01 12897539