Year	Percent
1982-01-01	0.1726650000000000
1983-01-01	0.3329510000000000
1984-01-01	1.0134700000000000
1985-01-01	1.4697200000000001
1986-01-01	1.4808600000000000
1987-01-01	2.6674599999999997
1988-01-01	2.6562600000000000
1989-01-01	2.1150700000000002
1990-01-01	1.2626500000000000
1991-01-01	1.2959800000000000
1992-01-01	1.0509899999999999
1993-01-01	1.5343900000000000
1994-01-01	1.4905700000000002
1995-01-01	1.3641200000000000
1996-01-01	1.8603200000000000
1997-01-01	2.7147000000000000
1998-01-01	2.9793100000000000
1999-01-01	8.9267399999999990
2000-01-01	16.7138000000000000
2001-01-01	26.2971000000000000
2002-01-01	34.8254000000000000
2003-01-01	42.9486000000000000
2004-01-01	46.8095000000000000
2005-01-01	46.7836000000000000
2006-01-01	60.9461000000000000
2007-01-01	68.6359000000000000
2008-01-01	65.7370000000000000
2009-01-01	86.5729000000000000
2010-01-01	78.3723000000000000
2011-01-01	69.2434000000000000
2012-01-01	68.9114000000000000
2013-01-01	63.5471000000000000
2014-01-01	48.3011000000000000
2015-01-01	46.0063000000000000
2016-01-01	40.1787000000000000