Year Percent 1995-01-01 2.86910000000000 1996-01-01 6.70375000000000 1997-01-01 14.63940000000000 1998-01-01 23.05550000000000 1999-01-01 29.65820000000000 2000-01-01 40.28930000000000 2001-01-01 50.90170000000000 2002-01-01 76.26020000000000 2003-01-01 77.58530000000000 2004-01-01 90.51090000000000 2005-01-01 96.99880000000000 2006-01-01 109.54000000000000 2007-01-01 96.39580000000000 2008-01-01 81.71960000000000 2009-01-01 64.40910000000000 2010-01-01 61.75350000000000 2011-01-01 71.48899999999999 2012-01-01 75.65590000000000 2013-01-01 78.75390000000000 2014-01-01 78.45830000000000 2015-01-01 76.50410000000000 2016-01-01 75.57140000000000