Year Dollars 1992-01-01 7126052 1997-01-01 4592180 2002-01-01 9903388 2003-01-01 6445234 2004-01-01 9429806 2005-01-01 10786827 2006-01-01 13954377 2007-01-01 12564899 2008-01-01 15137641 2009-01-01 9180056 2010-01-01 23407886 2011-01-01 13353530 2012-01-01 18321997 2013-01-01 14771305 2014-01-01 16540357 2015-01-01 16080044 2016-01-01 21733967