Year	Percent
1983-01-01	12.495600000000000
1984-01-01	12.140400000000000
1985-01-01	13.110500000000000
1986-01-01	13.844400000000000
1987-01-01	12.336100000000000
1988-01-01	12.005500000000000
1989-01-01	11.461900000000000
1990-01-01	11.368100000000000
1991-01-01	11.325200000000000
1992-01-01	12.031800000000000
1993-01-01	11.106900000000000
1994-01-01	11.091000000000000
1995-01-01	10.590100000000000
1996-01-01	15.370100000000000
1997-01-01	16.186700000000000
1998-01-01	18.243600000000000
1999-01-01	18.051300000000000
2000-01-01	16.707800000000000
2001-01-01	16.398200000000000
2002-01-01	13.757200000000000
2003-01-01	12.414200000000000
2004-01-01	12.333300000000000
2005-01-01	11.566800000000000
2006-01-01	12.876600000000000
2007-01-01	13.780999999999999
2008-01-01	10.355300000000000
2009-01-01	11.640500000000000
2010-01-01	12.277600000000000
2011-01-01	12.669400000000000
2012-01-01	15.631800000000000
2013-01-01	15.017400000000000
2014-01-01	14.448900000000000
2015-01-01	18.348500000000000
2016-01-01	22.809800000000000