Year	Percent
1983-01-01	14.1478000000000000
1984-01-01	10.6081000000000000
1985-01-01	9.8851500000000000
1986-01-01	14.9013000000000000
1987-01-01	13.4086000000000000
1988-01-01	7.4821399999999990
1989-01-01	6.1280700000000000
1990-01-01	4.7867700000000000
1991-01-01	4.0424700000000000
1992-01-01	3.9511900000000000
1993-01-01	4.3071100000000000
1994-01-01	6.1024300000000000
1995-01-01	6.2991800000000010
1996-01-01	7.0434500000000000
1997-01-01	7.4693399999999990
1998-01-01	25.7723000000000000
1999-01-01	31.8042000000000000
2000-01-01	22.1604000000000000
2001-01-01	16.4834000000000000
2002-01-01	19.7964000000000000
2003-01-01	9.6506000000000000
2004-01-01	7.6255300000000000
2005-01-01	7.5294899999999990
2006-01-01	3.1959900000000000
2007-01-01	3.1326000000000000
2008-01-01	2.1110400000000000
2009-01-01	4.4579000000000000
2010-01-01	1.7862799999999999
2011-01-01	4.4359800000000010
2012-01-01	1.8903900000000002
2013-01-01	1.4087600000000000
2014-01-01	2.0426200000000000
2015-01-01	2.6475800000000000
2016-01-01	1.8051900000000000