Year Dollars 1992-01-01 15082895 1997-01-01 18518162 2002-01-01 10322308 2003-01-01 23867946 2004-01-01 16032835 2005-01-01 16864878 2006-01-01 21335339 2007-01-01 22045493 2008-01-01 27138427 2009-01-01 28621026 2010-01-01 27157906 2011-01-01 21372041 2012-01-01 28359529 2013-01-01 13333482 2014-01-01 13046945 2015-01-01 60171644 2016-01-01 29662051