Year Dollars 1992-01-01 22722377 1997-01-01 13449577 2002-01-01 29464959 2003-01-01 23242946 2004-01-01 19795347 2005-01-01 33042002 2006-01-01 42362242 2007-01-01 86671271 2008-01-01 77925117 2009-01-01 36820979 2010-01-01 33276235 2011-01-01 30143221 2012-01-01 16615373 2013-01-01 23791491 2014-01-01 23543136 2015-01-01 23075230 2016-01-01 19817219