Year Dollars 1997-01-01 314691 2002-01-01 486777 2003-01-01 811582 2004-01-01 885028 2005-01-01 1247277 2006-01-01 2056500 2007-01-01 2032334 2008-01-01 2718565 2009-01-01 1743189 2010-01-01 2331066 2011-01-01 4509742 2012-01-01 4058734 2013-01-01 4054025 2014-01-01 4286870 2015-01-01 2734326 2016-01-01 6955949