Year Dollars 1992-01-01 56310378 1997-01-01 124701095 2002-01-01 177391309 2003-01-01 224180373 2004-01-01 272429696 2005-01-01 396414585 2006-01-01 531131108 2007-01-01 745704423 2008-01-01 902350925 2009-01-01 848750981 2010-01-01 1076078777 2011-01-01 1154607736 2012-01-01 1286917260 2013-01-01 1312457040 2014-01-01 1359025501 2015-01-01 1241058809 2016-01-01 1731514785