Year Dollars 1992-01-01 171286134 1997-01-01 259979622 2002-01-01 149800231 2003-01-01 148170971 2004-01-01 172336987 2005-01-01 200573459 2006-01-01 210836580 2007-01-01 229885368 2008-01-01 234928324 2009-01-01 204162560 2010-01-01 229947630 2011-01-01 265712765 2012-01-01 292946241 2013-01-01 410616562 2014-01-01 631707534 2015-01-01 408416617 2016-01-01 491312420