Year	Percent
1987-01-01	1.2499100000000000
1988-01-01	1.0913100000000000
1989-01-01	1.0485799999999998
1990-01-01	1.2561200000000001
1991-01-01	1.2911800000000000
1992-01-01	1.1250799999999999
1993-01-01	1.3752300000000000
1994-01-01	2.2008500000000000
1995-01-01	1.7868400000000002
1996-01-01	1.6583100000000000
1997-01-01	1.8648600000000000
1998-01-01	1.7494800000000000
1999-01-01	1.6703700000000001
2000-01-01	1.4871600000000000
2001-01-01	1.3767700000000000
2002-01-01	1.2499000000000000
2003-01-01	1.2559900000000000
2004-01-01	1.2802200000000001
2005-01-01	1.1987100000000000
2006-01-01	1.0491000000000000
2007-01-01	1.1096200000000000
2008-01-01	1.0180700000000000
2009-01-01	0.9152680000000001
2010-01-01	1.1635400000000000
2011-01-01	1.5609600000000001
2012-01-01	2.0155400000000000
2013-01-01	2.8365000000000000
2014-01-01	4.1231200000000000
2015-01-01	4.6906400000000000
2016-01-01	5.6636900000000000