Year Dollars 1997-01-01 3077477 2002-01-01 7260066 2003-01-01 8383458 2004-01-01 10202465 2005-01-01 16411109 2006-01-01 16594691 2007-01-01 17703994 2008-01-01 45414401 2009-01-01 28042061 2010-01-01 30830432 2011-01-01 62580279 2012-01-01 62607654 2013-01-01 46732275 2014-01-01 47400949 2015-01-01 73156491 2016-01-01 84277557