Year Percent 1994-01-01 0.5211680000000001 1995-01-01 0.2515500000000000 1996-01-01 0.2604880000000000 1997-01-01 0.3474510000000000 1998-01-01 0.6819870000000000 1999-01-01 0.8057240000000000 2000-01-01 1.1300000000000000 2001-01-01 1.3429300000000000 2002-01-01 1.8181300000000000 2003-01-01 3.2337599999999997 2004-01-01 5.4306800000000010 2005-01-01 2.7226100000000000 2006-01-01 2.3272300000000000 2007-01-01 2.3165200000000000 2008-01-01 2.0606700000000000 2009-01-01 2.0834500000000000 2010-01-01 1.9519200000000000 2011-01-01 1.4880000000000002 2012-01-01 1.2354200000000000 2013-01-01 1.5825300000000000 2014-01-01 1.3835400000000000 2015-01-01 1.2487500000000000 2016-01-01 1.2107400000000000