Year Dollars 2002-01-01 78672 2003-01-01 602443 2004-01-01 517787 2005-01-01 255815 2006-01-01 163138 2008-01-01 163986 2010-01-01 513375 2011-01-01 435163 2014-01-01 802380 2015-01-01 317016