Year	Percent
1983-01-01	7.8026899999999990
1984-01-01	7.8269800000000010
1985-01-01	8.5893500000000000
1986-01-01	8.4565500000000000
1987-01-01	5.0951200000000000
1988-01-01	3.5669100000000000
1989-01-01	4.4083100000000000
1990-01-01	5.0886700000000000
1991-01-01	5.9343699999999995
1992-01-01	12.7456000000000000
1993-01-01	18.4257000000000000
1994-01-01	16.4509000000000000
1995-01-01	14.0864000000000000
1996-01-01	12.3800000000000000
1997-01-01	13.8366000000000000
1998-01-01	14.1447000000000000
1999-01-01	11.3261000000000000
2000-01-01	9.4852200000000000
2001-01-01	11.6021000000000000
2002-01-01	14.1606000000000000
2003-01-01	17.0902000000000000
2004-01-01	22.2812000000000000
2005-01-01	24.2017000000000000
2006-01-01	23.9407000000000000
2007-01-01	26.0338000000000000
2008-01-01	30.4957000000000000
2009-01-01	35.4860000000000000
2010-01-01	41.9098000000000000
2011-01-01	47.8660000000000100
2012-01-01	52.4146000000000000
2013-01-01	51.8882000000000000
2014-01-01	50.0508000000000000
2015-01-01	51.2535000000000000
2016-01-01	53.4210000000000100