Year	Percent
1990-01-01	1.1044500000000000
1991-01-01	1.2650600000000000
1992-01-01	1.2772800000000000
1993-01-01	1.2520100000000000
1994-01-01	1.1565600000000000
1995-01-01	1.0694600000000000
1996-01-01	0.9657580000000000
1997-01-01	1.0017700000000000
1998-01-01	1.2734299999999998
1999-01-01	1.2290100000000000
2000-01-01	0.8658469999999999
2001-01-01	0.8389830000000000
2002-01-01	1.0994300000000000
2003-01-01	1.0996200000000000
2004-01-01	0.9068600000000000
2005-01-01	0.7809610000000000
2006-01-01	0.7923439999999999
2007-01-01	0.8276160000000000
2008-01-01	0.7029030000000000
2009-01-01	0.8847750000000000
2010-01-01	0.7929060000000000
2011-01-01	0.7041370000000000
2012-01-01	0.7610870000000000
2013-01-01	0.8541600000000000
2014-01-01	0.8685280000000001
2015-01-01	0.9160100000000000