Year Dollars 1992-01-01 6277105 1997-01-01 6785969 2002-01-01 7864723 2003-01-01 3627757 2004-01-01 7724127 2005-01-01 8603358 2006-01-01 15830344 2007-01-01 15139437 2008-01-01 14072723 2009-01-01 12750871 2010-01-01 13878173 2011-01-01 21053759 2012-01-01 23157065 2013-01-01 40728393 2014-01-01 43267225 2015-01-01 21717128 2016-01-01 26956856