Year Dollars 1992-01-01 13480228 1997-01-01 18021313 2002-01-01 25655329 2003-01-01 25851114 2004-01-01 27234474 2005-01-01 39259729 2006-01-01 66946616 2007-01-01 74506602 2008-01-01 59568691 2009-01-01 44914072 2010-01-01 54835158 2011-01-01 66307853 2012-01-01 71547421 2013-01-01 50698245 2014-01-01 50885194 2015-01-01 40675146 2016-01-01 37179736