Year Dollars 1992-01-01 220514 1997-01-01 846832 2002-01-01 5091531 2003-01-01 6191976 2004-01-01 6928764 2005-01-01 5185536 2006-01-01 3748147 2008-01-01 132722985 2010-01-01 155951638 2011-01-01 114218414 2012-01-01 139311717 2016-01-01 17977756