Year Dollars 1997-01-01 66008 2003-01-01 63990 2004-01-01 20475 2005-01-01 109486 2007-01-01 215010 2008-01-01 324509 2009-01-01 127046 2010-01-01 650069 2011-01-01 252806 2012-01-01 292045 2013-01-01 415729 2014-01-01 474476 2016-01-01 508254