Year Dollars 1992-01-01 3210148 1997-01-01 3457558 2002-01-01 3113520 2003-01-01 5722680 2004-01-01 6504253 2005-01-01 7419881 2006-01-01 8555995 2007-01-01 9121235 2008-01-01 79113551 2009-01-01 7542080 2010-01-01 8115343 2011-01-01 10287142 2012-01-01 11752589 2013-01-01 13789489 2014-01-01 12788414 2015-01-01 12265757 2016-01-01 11441626