Year Dollars 2002-01-01 2563261 2006-01-01 8673101 2007-01-01 12910838 2011-01-01 39405735 2012-01-01 45205536 2013-01-01 41362770 2014-01-01 24772516 2015-01-01 19747502 2016-01-01 22006561