Year Dollars 1992-01-01 1184101 1997-01-01 3279569 2002-01-01 6220553 2003-01-01 4728258 2004-01-01 6462850 2005-01-01 7356926 2006-01-01 6489011 2007-01-01 6264944 2008-01-01 10549105 2009-01-01 9822228 2010-01-01 15524608 2011-01-01 17789212 2012-01-01 19352099 2013-01-01 12778888 2014-01-01 20242965 2015-01-01 18751219 2016-01-01 11966452