Year Dollars 1992-01-01 13354383 1997-01-01 13847047 2002-01-01 15158163 2003-01-01 22018778 2004-01-01 36597629 2005-01-01 26937387 2006-01-01 31328694 2007-01-01 28778972 2008-01-01 26952269 2009-01-01 28553576 2010-01-01 30471846 2011-01-01 38429985 2012-01-01 40346606 2013-01-01 31303239 2014-01-01 33416885 2015-01-01 34995048 2016-01-01 35285132