Year Dollars 1992-01-01 3587482 1997-01-01 6191092 2002-01-01 7823597 2003-01-01 8407505 2004-01-01 10958665 2005-01-01 19947234 2006-01-01 26567929 2007-01-01 20729208 2008-01-01 32541644 2009-01-01 20095489 2010-01-01 27398669 2011-01-01 28546954 2012-01-01 42178730 2013-01-01 39485404 2014-01-01 33272278 2015-01-01 38440888 2016-01-01 25935406