Year Dollars 2002-01-01 308065 2005-01-01 631352 2006-01-01 553882 2007-01-01 627865 2008-01-01 511245 2009-01-01 1261101 2011-01-01 1721504 2012-01-01 3674229 2013-01-01 1250321 2014-01-01 1722558 2015-01-01 4715762 2016-01-01 981726