Year Dollars 1992-01-01 522545 2002-01-01 3312443 2003-01-01 1927296 2004-01-01 6869155 2005-01-01 6595546 2006-01-01 11006001 2007-01-01 13774936 2008-01-01 14729414 2009-01-01 6883833 2010-01-01 12215365 2011-01-01 14799668 2012-01-01 19472829 2013-01-01 14054543 2014-01-01 9552942 2015-01-01 9736354 2016-01-01 6307181