Year Dollars 1997-01-01 556655 2002-01-01 149711 2003-01-01 1156114 2005-01-01 382944 2006-01-01 101884 2008-01-01 314489 2011-01-01 711889 2012-01-01 458018 2013-01-01 229414 2014-01-01 180547 2015-01-01 323049 2016-01-01 348193