Year	Percent
1983-01-01	10.6219000000000000
1984-01-01	4.8099000000000000
1985-01-01	10.1354000000000000
1986-01-01	7.9961800000000010
1987-01-01	11.6274000000000000
1988-01-01	12.2696000000000000
1989-01-01	11.9703000000000000
1990-01-01	8.9896100000000000
1991-01-01	7.6473500000000000
1992-01-01	6.4482800000000005
1993-01-01	19.6894000000000000
1994-01-01	8.9200100000000010
1995-01-01	8.7675100000000010
1996-01-01	12.8096000000000000
1997-01-01	15.0437000000000000
1998-01-01	15.9227000000000000
1999-01-01	30.4973000000000000
2000-01-01	29.8052000000000000
2001-01-01	39.1973000000000000
2002-01-01	26.0948000000000000
2003-01-01	23.5187000000000000
2004-01-01	23.2007000000000000
2005-01-01	19.8455000000000000
2006-01-01	35.0651000000000000
2007-01-01	37.0378000000000000
2008-01-01	38.4998000000000000
2009-01-01	37.2110000000000000
2010-01-01	36.9642000000000000
2011-01-01	34.2899000000000000
2012-01-01	41.3811000000000000
2013-01-01	41.0821000000000000
2014-01-01	36.6589000000000000
2015-01-01	29.9962000000000000
2016-01-01	29.6091000000000000