Year Dollars 1992-01-01 10620309 1997-01-01 9292437 2002-01-01 12521295 2003-01-01 6694434 2004-01-01 13517096 2005-01-01 9381625 2006-01-01 11829989 2007-01-01 13433765 2008-01-01 18721379 2009-01-01 19418969 2010-01-01 33561977 2011-01-01 22850911 2012-01-01 26193136 2013-01-01 25743634 2014-01-01 35158023 2015-01-01 23790880 2016-01-01 17439972