Year Dollars 1997-01-01 571207 2002-01-01 1196425 2004-01-01 5034224 2005-01-01 5728661 2006-01-01 3572301 2007-01-01 1871029 2008-01-01 3172223 2009-01-01 2184508 2010-01-01 2546247 2011-01-01 3114027 2012-01-01 2799674 2013-01-01 2622316 2014-01-01 2427677 2015-01-01 3641748 2016-01-01 3747448