Year	Percent
1989-01-01	4.978540000000000
1990-01-01	4.978540000000000
1991-01-01	4.978540000000000
1992-01-01	14.370700000000000
1993-01-01	11.103600000000000
1994-01-01	8.544010000000000
1995-01-01	8.478890000000000
1996-01-01	7.969480000000000
1997-01-01	9.282210000000001
1998-01-01	10.464700000000000
1999-01-01	11.537900000000000
2000-01-01	14.628700000000000
2001-01-01	13.078100000000000
2002-01-01	13.047000000000000
2003-01-01	13.999700000000000
2004-01-01	13.632600000000000
2005-01-01	15.088400000000000
2006-01-01	18.393200000000000
2007-01-01	17.111100000000000
2008-01-01	20.100200000000000
2009-01-01	26.182900000000000
2010-01-01	29.980700000000000
2011-01-01	31.614600000000000
2012-01-01	32.868400000000000
2013-01-01	37.374100000000000
2014-01-01	43.288500000000000
2015-01-01	46.602600000000000
2016-01-01	46.899200000000000