Year Dollars 1997-01-01 170427 2004-01-01 449536 2005-01-01 379193 2007-01-01 4260334 2009-01-01 1238849 2010-01-01 688118 2011-01-01 1539942 2012-01-01 677038 2013-01-01 1185996 2014-01-01 1557287 2015-01-01 955046 2016-01-01 946217