Year Dollars 1992-01-01 1735238 1997-01-01 2096972 2002-01-01 1534258 2003-01-01 3468321 2004-01-01 4564189 2005-01-01 4239545 2006-01-01 4580548 2007-01-01 3996655 2008-01-01 4779288 2009-01-01 4946645 2010-01-01 4493880 2011-01-01 5961069 2012-01-01 23409784 2013-01-01 6515561 2014-01-01 7349025 2015-01-01 16819918