Year Dollars 1992-01-01 522164156 1997-01-01 310282698 2002-01-01 1168057746 2003-01-01 1084947356 2004-01-01 1173414836 2006-01-01 1198855941 2007-01-01 1403376925 2011-01-01 1942645661 2016-01-01 1947236267