Year Dollars 1992-01-01 77081080 1997-01-01 154221937 2002-01-01 129817940 2003-01-01 112546052 2004-01-01 147805954 2005-01-01 126235313 2006-01-01 147971412 2007-01-01 166665369 2008-01-01 176708901 2009-01-01 171709258 2010-01-01 189257178 2011-01-01 226758144 2012-01-01 217409651 2013-01-01 227677807 2014-01-01 314307450 2015-01-01 199022641 2016-01-01 263377184