Year Dollars 1992-01-01 7848097 1997-01-01 9118082 2002-01-01 16537041 2003-01-01 15795549 2004-01-01 26902421 2005-01-01 22281868 2006-01-01 22104683 2007-01-01 28885275 2008-01-01 39403582 2009-01-01 32772492 2010-01-01 29719417 2011-01-01 43976834 2012-01-01 52487868 2013-01-01 58067033 2014-01-01 51351168 2015-01-01 53969474 2016-01-01 57431791