Year	Percent
1990-01-01	4.697440000000000
1991-01-01	4.715120000000000
1992-01-01	6.249650000000000
1993-01-01	7.720470000000000
1994-01-01	8.602150000000000
1995-01-01	8.733889999999999
1996-01-01	10.157100000000000
1997-01-01	11.190000000000000
1998-01-01	9.911030000000000
1999-01-01	12.857500000000000
2000-01-01	15.466700000000000
2001-01-01	26.802700000000000
2002-01-01	34.698400000000000
2003-01-01	43.648000000000000
2004-01-01	39.505000000000000
2005-01-01	34.826400000000000
2006-01-01	30.898200000000000
2007-01-01	31.116200000000000
2008-01-01	22.448600000000000
2009-01-01	32.906300000000000
2010-01-01	28.956500000000000
2011-01-01	22.185400000000000
2012-01-01	24.034300000000000
2013-01-01	19.173200000000000
2014-01-01	18.591100000000000
2015-01-01	16.961500000000000
2016-01-01	14.811400000000000