Year Dollars 1992-01-01 152340799 1997-01-01 155540126 2002-01-01 234198424 2003-01-01 251393725 2004-01-01 246910889 2005-01-01 263624039 2006-01-01 284746252 2007-01-01 387103715 2008-01-01 377265184 2009-01-01 310596578 2010-01-01 443465157 2011-01-01 489726743 2012-01-01 492742052 2013-01-01 501435501 2014-01-01 622757631 2015-01-01 701476386 2016-01-01 688011727