Year Dollars 1992-01-01 336966 1997-01-01 3354254 2002-01-01 2372691 2003-01-01 4506958 2004-01-01 14710786 2005-01-01 24996616 2006-01-01 32220159 2007-01-01 33954505 2008-01-01 37453231 2009-01-01 13511328 2010-01-01 14597960 2011-01-01 23561121 2012-01-01 29606138 2013-01-01 22439108 2014-01-01 28817564 2015-01-01 31366776 2016-01-01 35083752