Year Dollars 1997-01-01 10737523 2002-01-01 6331922 2005-01-01 1227046 2009-01-01 54052474 2010-01-01 80289176 2011-01-01 122872903 2012-01-01 63788005 2013-01-01 44755868 2015-01-01 18481560 2016-01-01 2856789