Year Dollars 1992-01-01 10766729 1997-01-01 11730051 2002-01-01 13899032 2003-01-01 13937996 2004-01-01 16508607 2005-01-01 26712606 2006-01-01 19606383 2007-01-01 62513058 2008-01-01 24973718 2009-01-01 19691446 2010-01-01 22163269 2011-01-01 40944732 2012-01-01 27896580 2013-01-01 22914612 2014-01-01 47466727 2015-01-01 28805849 2016-01-01 25848494