Year Dollars 1992-01-01 906967 1997-01-01 5959017 2002-01-01 9423649 2003-01-01 9023987 2004-01-01 9254808 2005-01-01 10331097 2006-01-01 9233482 2007-01-01 11584906 2008-01-01 15561260 2009-01-01 6969824 2010-01-01 10277407 2011-01-01 10610535 2012-01-01 16648464 2013-01-01 16603497 2014-01-01 12079656 2015-01-01 47698785 2016-01-01 57164126