Year Dollars 1992-01-01 54151638 1997-01-01 136027808 2002-01-01 257983939 2003-01-01 131959279 2004-01-01 351657757 2005-01-01 429349035 2006-01-01 272767302 2007-01-01 372941426 2008-01-01 370328116 2009-01-01 347923821 2010-01-01 347737029 2011-01-01 484268590 2012-01-01 474663738 2013-01-01 514266660 2014-01-01 605124207 2015-01-01 885674475 2016-01-01 425591785