Year Dollars 1997-01-01 180362 2002-01-01 96979 2003-01-01 132612 2004-01-01 391288 2005-01-01 373926 2006-01-01 701476 2007-01-01 1556821 2008-01-01 1401316 2009-01-01 1917480 2010-01-01 262301 2011-01-01 1683126 2012-01-01 2256297 2013-01-01 536174 2014-01-01 3839960 2016-01-01 789774