Year Dollars 1992-01-01 575438 1997-01-01 1067928 2002-01-01 8920435 2007-01-01 1539923 2008-01-01 1138908 2009-01-01 1764467 2011-01-01 3299963 2012-01-01 1221056 2013-01-01 1342556 2014-01-01 1331690 2015-01-01 1576131 2016-01-01 1516918