Year Dollars 1992-01-01 178501 1997-01-01 235164 2002-01-01 262275 2004-01-01 360316 2005-01-01 615034 2006-01-01 6254414 2007-01-01 512333 2008-01-01 1531508 2009-01-01 1993207 2010-01-01 1642474 2011-01-01 3117085 2012-01-01 5339444 2013-01-01 8319805 2014-01-01 13978858 2015-01-01 4322401 2016-01-01 4221226