Year Dollars 1997-01-01 1176995 2002-01-01 5665198 2004-01-01 1003063 2005-01-01 1538477 2006-01-01 2192591 2007-01-01 2584830 2008-01-01 15352449 2009-01-01 5587376 2010-01-01 3652300 2011-01-01 17160140 2012-01-01 20934894 2013-01-01 20422001 2014-01-01 9501715 2015-01-01 760993 2016-01-01 1138984