Year	Percent
1983-01-01	11.56740
1984-01-01	12.12670
1985-01-01	19.14840
1986-01-01	17.12900
1987-01-01	19.30660
1988-01-01	13.48490
1989-01-01	18.04320
1990-01-01	16.12920
1991-01-01	11.16770
1992-01-01	8.80180
1993-01-01	7.28342
1994-01-01	12.45080
1995-01-01	14.17990
1996-01-01	12.30030
1997-01-01	13.21600
1998-01-01	15.62400
1999-01-01	19.94630
2000-01-01	20.07080
2001-01-01	17.60500
2002-01-01	20.07860
2003-01-01	19.00400
2004-01-01	19.66670
2005-01-01	16.85240
2006-01-01	18.00640
2007-01-01	19.22440
2008-01-01	13.76510
2009-01-01	12.92230
2010-01-01	20.14210
2011-01-01	24.06410
2012-01-01	25.00070
2013-01-01	23.54910
2014-01-01	24.33750
2015-01-01	26.04270
2016-01-01	25.28590