Year Dollars 1992-01-01 20125644 1997-01-01 95831411 2002-01-01 237833207 2003-01-01 260588830 2004-01-01 210230599 2005-01-01 226904662 2006-01-01 156985268 2007-01-01 54377149 2008-01-01 80408968 2009-01-01 202845879 2010-01-01 218078919 2011-01-01 202527141 2012-01-01 190384776 2013-01-01 209776287 2014-01-01 219528314 2015-01-01 232623795 2016-01-01 220016286