Year Dollars 1992-01-01 34735368 1997-01-01 37328682 2002-01-01 32439101 2003-01-01 30156965 2004-01-01 29795367 2005-01-01 36894712 2006-01-01 36982500 2007-01-01 52207972 2008-01-01 57516810 2009-01-01 41765000 2010-01-01 53198782 2011-01-01 61315661 2012-01-01 62213057 2013-01-01 58515349 2014-01-01 63640440 2015-01-01 52644657 2016-01-01 58625414