Year Dollars 1997-01-01 160539 2002-01-01 137000 2004-01-01 93988 2005-01-01 597409 2006-01-01 1328750 2009-01-01 62045 2010-01-01 218958 2012-01-01 88911 2014-01-01 191342 2015-01-01 183879