Year Dollars 1992-01-01 7213529 1997-01-01 626053 2002-01-01 3629831 2003-01-01 3855332 2004-01-01 5503991 2005-01-01 4849103 2006-01-01 5646857 2007-01-01 6237902 2008-01-01 7427904 2009-01-01 4307088 2010-01-01 9351496 2011-01-01 10585416 2012-01-01 13423630 2013-01-01 11012805 2014-01-01 13525576 2015-01-01 23838069 2016-01-01 22725606