Year Dollars 1992-01-01 1965470 1997-01-01 2952098 2002-01-01 3501222 2003-01-01 4415527 2004-01-01 2892629 2005-01-01 4721918 2006-01-01 5889573 2007-01-01 6226655 2008-01-01 4704428 2009-01-01 4320516 2010-01-01 4946068 2011-01-01 3007990 2012-01-01 5116313 2013-01-01 4609759 2014-01-01 4994352 2015-01-01 5783127 2016-01-01 6631768