Year	Percent
1983-01-01	18.226600000000000
1984-01-01	18.278300000000000
1985-01-01	16.917900000000000
1986-01-01	19.616100000000000
1987-01-01	19.565000000000000
1988-01-01	17.130800000000000
1989-01-01	13.258100000000000
1990-01-01	8.333660000000000
1991-01-01	7.097430000000000
1992-01-01	7.546810000000001
1993-01-01	10.634700000000000
1994-01-01	12.386300000000000
1995-01-01	11.961600000000000
1996-01-01	11.042300000000000
1997-01-01	10.862300000000000
1998-01-01	15.916800000000000
1999-01-01	14.488700000000000
2000-01-01	13.862300000000000
2001-01-01	14.890900000000000
2002-01-01	15.071600000000000
2003-01-01	16.599600000000000
2004-01-01	21.510700000000000
2005-01-01	24.871900000000000
2006-01-01	30.057200000000000
2007-01-01	47.093999999999994
2008-01-01	38.301000000000000
2009-01-01	50.164600000000000
2010-01-01	46.203500000000000
2011-01-01	38.428500000000000
2012-01-01	36.394300000000000
2013-01-01	35.773500000000000
2014-01-01	35.903300000000000
2015-01-01	45.863700000000000
2016-01-01	46.715300000000000