Year Dollars 1992-01-01 16816533 1997-01-01 25919062 2002-01-01 28299340 2003-01-01 26773972 2004-01-01 38175848 2005-01-01 46169882 2006-01-01 47594001 2007-01-01 51797522 2008-01-01 45092172 2009-01-01 26795788 2010-01-01 35114978 2011-01-01 32487376 2012-01-01 41136396 2013-01-01 44508140 2014-01-01 53051563 2015-01-01 45600925 2016-01-01 59507321