Year Dollars 1992-01-01 4398666 1997-01-01 6351441 2002-01-01 4681539 2003-01-01 5667173 2004-01-01 5822382 2005-01-01 6576202 2006-01-01 5322677 2007-01-01 4786349 2008-01-01 3345860 2009-01-01 4065524 2010-01-01 3840889 2011-01-01 4569802 2012-01-01 4155716 2013-01-01 4546273 2014-01-01 3885807 2015-01-01 6116088 2016-01-01 5756877