Year	Percent
1983-01-01	0.9390830000000000
1984-01-01	0.9390830000000000
1985-01-01	0.9390830000000000
1986-01-01	1.6736600000000000
1987-01-01	1.4424700000000001
1988-01-01	2.3224600000000000
1989-01-01	8.6050100000000000
1990-01-01	8.3210100000000010
1991-01-01	12.1795000000000000
1992-01-01	9.3341500000000000
1993-01-01	6.0921199999999995
1994-01-01	4.2439300000000010
1995-01-01	5.5217300000000010
1996-01-01	6.5091500000000000
1997-01-01	7.6591500000000000
1998-01-01	7.5745500000000000
1999-01-01	7.8999200000000000
2000-01-01	8.9341200000000000
2001-01-01	7.4559700000000000
2002-01-01	7.2279399999999990
2003-01-01	8.5329600000000010
2004-01-01	10.7269000000000000
2005-01-01	9.5448399999999990
2006-01-01	11.9825000000000000
2007-01-01	19.2871000000000000
2008-01-01	14.8844000000000000
2009-01-01	15.8572000000000000
2010-01-01	18.2331000000000000
2011-01-01	21.1916000000000000
2012-01-01	21.2216000000000000
2013-01-01	21.3303000000000000
2014-01-01	22.0703000000000000
2015-01-01	21.6785000000000000
2016-01-01	22.5391000000000000