Year Percent 1995-01-01 8.68523 1996-01-01 11.27450 1997-01-01 20.53110 1998-01-01 19.97690 1999-01-01 10.25110 2000-01-01 10.16540 2001-01-01 13.79240 2002-01-01 12.89830 2003-01-01 14.21260 2004-01-01 13.05800 2005-01-01 12.88240 2006-01-01 14.78020 2007-01-01 15.70970 2008-01-01 17.71880 2009-01-01 30.67150 2010-01-01 32.31890 2011-01-01 31.07740 2012-01-01 33.18980 2013-01-01 34.03030 2014-01-01 38.08320 2015-01-01 43.74060 2016-01-01 40.83670