Year Dollars 1997-01-01 19359 2002-01-01 179033 2005-01-01 62476 2007-01-01 231701 2008-01-01 117094 2009-01-01 1731566 2011-01-01 428938 2012-01-01 213206 2014-01-01 103799 2016-01-01 61704