Year Dollars 1992-01-01 3048544 1997-01-01 5552825 2002-01-01 8258615 2003-01-01 5910541 2004-01-01 7720277 2005-01-01 10704828 2006-01-01 7252356 2007-01-01 7252969 2008-01-01 8906000 2009-01-01 9103474 2010-01-01 8596406 2011-01-01 8865852 2012-01-01 12434968 2013-01-01 11888947 2014-01-01 13240083 2015-01-01 14543614 2016-01-01 14399192