Year Dollars 1992-01-01 16683776 1997-01-01 28046904 2002-01-01 28766528 2003-01-01 36611934 2004-01-01 33587002 2005-01-01 31738583 2006-01-01 43603289 2007-01-01 31774558 2008-01-01 42032256 2009-01-01 34300033 2010-01-01 45733952 2011-01-01 43919279 2012-01-01 46796832 2013-01-01 37379340 2014-01-01 49496043 2015-01-01 28426985 2016-01-01 24862182