Year Dollars 1992-01-01 21137129 1997-01-01 5642404 2002-01-01 2066467 2003-01-01 1704370 2004-01-01 3200247 2005-01-01 2614482 2006-01-01 1778238 2007-01-01 4431843 2008-01-01 5131501 2009-01-01 4655155 2010-01-01 6185874 2011-01-01 3527339 2012-01-01 5234114 2013-01-01 6562388 2014-01-01 8223498 2015-01-01 4476682 2016-01-01 7582868