Year Dollars 1997-01-01 467109 2002-01-01 595158 2004-01-01 101530 2006-01-01 88205 2007-01-01 160875 2008-01-01 667058 2009-01-01 1630501 2010-01-01 1427689 2011-01-01 3778778 2013-01-01 1905691 2014-01-01 2176390 2016-01-01 1927842