Year Dollars 1992-01-01 4327041 1997-01-01 7800127 2002-01-01 11743571 2003-01-01 10413741 2004-01-01 14163155 2005-01-01 15711278 2006-01-01 22544729 2007-01-01 23266359 2008-01-01 20130928 2009-01-01 16147968 2010-01-01 17580347 2011-01-01 22609456 2012-01-01 27122666 2013-01-01 37511560 2014-01-01 25465097 2015-01-01 21303788 2016-01-01 16742621