Year Dollars 1992-01-01 2663615 1997-01-01 17804310 2002-01-01 16600554 2003-01-01 31476317 2004-01-01 15930962 2005-01-01 15870796 2006-01-01 12295159 2007-01-01 24653903 2008-01-01 42635111 2009-01-01 24875899 2010-01-01 32244690 2011-01-01 40233106 2012-01-01 31142064 2013-01-01 24305464 2014-01-01 20077495 2015-01-01 15469889 2016-01-01 23512102