Year Dollars 1997-01-01 448277 2002-01-01 2081622 2003-01-01 1619131 2004-01-01 1098982 2005-01-01 397589 2006-01-01 1039326 2007-01-01 1295950 2008-01-01 2140161 2009-01-01 1997144 2010-01-01 1237514 2011-01-01 799066 2012-01-01 3175651 2013-01-01 2900550 2014-01-01 2523719 2015-01-01 2058978 2016-01-01 2275952