Year Dollars 1992-01-01 33184746 1997-01-01 60943763 2002-01-01 32968576 2003-01-01 12549888 2004-01-01 27586080 2005-01-01 45923575 2006-01-01 55882225 2007-01-01 71434472 2008-01-01 66948025 2009-01-01 42867124 2010-01-01 35090547 2011-01-01 37321571 2012-01-01 47236883 2013-01-01 54236029 2014-01-01 24238011 2015-01-01 19243085 2016-01-01 8703910