Year	Percent
1983-01-01	12.4074000000000000
1984-01-01	10.5538000000000000
1985-01-01	10.2605000000000000
1986-01-01	9.7861200000000000
1987-01-01	8.5862600000000010
1988-01-01	12.0087000000000000
1989-01-01	6.8189600000000010
1990-01-01	5.9009599999999995
1991-01-01	5.0972599999999995
1992-01-01	3.8746400000000003
1993-01-01	5.6387800000000010
1994-01-01	7.4689500000000000
1995-01-01	7.1780800000000005
1996-01-01	5.5077800000000000
1997-01-01	5.5425000000000000
1998-01-01	4.8086500000000000
1999-01-01	9.6586500000000000
2000-01-01	8.4268800000000000
2001-01-01	8.0967200000000000
2002-01-01	8.7059400000000000
2003-01-01	9.9448400000000000
2004-01-01	9.8323800000000000
2005-01-01	11.3526000000000000
2006-01-01	11.6885000000000000
2007-01-01	12.7433000000000000
2008-01-01	11.5677000000000000
2009-01-01	10.6454000000000000
2010-01-01	10.8381000000000000
2011-01-01	10.5111000000000000
2012-01-01	11.6594000000000000
2013-01-01	11.3697000000000000
2014-01-01	11.4855000000000000
2015-01-01	9.6714500000000000
2016-01-01	12.7211000000000000