Year Dollars 1997-01-01 162081 2002-01-01 21762 2004-01-01 20049 2005-01-01 122791 2007-01-01 78942 2008-01-01 185692 2009-01-01 341306 2010-01-01 80613 2011-01-01 101332 2012-01-01 183103 2013-01-01 754992 2015-01-01 743200 2016-01-01 614069