Year	Percent
1980-01-01	0.8389380000000000
1981-01-01	1.0268600000000000
1982-01-01	1.5436500000000000
1983-01-01	0.7292330000000000
1984-01-01	0.5616060000000000
1985-01-01	1.4560100000000000
1986-01-01	2.2262100000000000
1987-01-01	1.5914000000000000
1988-01-01	0.4024490000000000
1989-01-01	0.8936569999999999
1990-01-01	0.7802279999999999
1991-01-01	4.8140199999999990
1992-01-01	3.5533900000000003
1993-01-01	3.1045900000000000
1994-01-01	4.2799400000000000
1995-01-01	1.7257900000000002
1996-01-01	2.0650400000000000
1997-01-01	3.1149299999999998
1998-01-01	2.2574099999999997
1999-01-01	2.0118000000000000
2000-01-01	2.6644400000000004
2001-01-01	3.5242400000000003
2002-01-01	3.4087199999999998
2003-01-01	4.1407099999999994
2004-01-01	5.4117600000000000
2005-01-01	9.4240800000000000
2006-01-01	11.3876000000000000
2007-01-01	11.5819000000000000
2008-01-01	10.5241000000000000
2009-01-01	12.0133000000000000
2010-01-01	12.7781000000000000
2011-01-01	13.0262000000000000
2012-01-01	7.3497100000000010
2013-01-01	7.9160500000000000
2014-01-01	8.3552699999999990
2015-01-01	8.3677300000000000
2016-01-01	8.7024800000000000