Year Dollars 1997-01-01 103225 2002-01-01 3188080 2004-01-01 850722 2005-01-01 516320 2006-01-01 1305133 2007-01-01 598590 2008-01-01 1007188 2009-01-01 521404 2010-01-01 590797 2011-01-01 3111611 2012-01-01 1801566 2013-01-01 1407301 2015-01-01 447470 2016-01-01 735998