Year	Percent
1983-01-01	66.8502000000000000
1984-01-01	65.8752000000000000
1985-01-01	83.5109000000000000
1986-01-01	72.2231000000000000
1987-01-01	62.9827000000000000
1988-01-01	44.9774000000000000
1989-01-01	36.8260000000000000
1990-01-01	30.1206000000000000
1991-01-01	29.4328000000000000
1992-01-01	25.5350000000000000
1993-01-01	25.4440000000000030
1994-01-01	38.8275000000000000
1995-01-01	51.9375000000000000
1996-01-01	40.8549000000000000
1997-01-01	52.4385000000000000
1998-01-01	62.9398000000000000
1999-01-01	54.2077000000000000
2000-01-01	40.3117000000000000
2001-01-01	37.2192000000000000
2002-01-01	32.4835000000000000
2003-01-01	26.6028000000000000
2004-01-01	15.7896000000000000
2005-01-01	7.7378000000000000
2006-01-01	6.0921500000000000
2007-01-01	5.6485600000000000
2008-01-01	4.3336900000000000
2009-01-01	2.7304900000000000
2010-01-01	2.5567900000000003
2011-01-01	2.2301000000000000
2012-01-01	2.9583400000000000
2013-01-01	3.1039900000000000
2014-01-01	3.7647800000000005
2015-01-01	8.4636300000000000
2016-01-01	8.3816600000000000