Year Dollars 1992-01-01 2075197 1997-01-01 1474721 2002-01-01 10233454 2003-01-01 5240435 2004-01-01 4351582 2005-01-01 8781165 2006-01-01 5755653 2007-01-01 10891039 2008-01-01 10488513 2009-01-01 12306442 2010-01-01 15816701 2011-01-01 15536863 2012-01-01 14264135 2013-01-01 13937546 2014-01-01 10878393 2015-01-01 8477333 2016-01-01 8533243