Year	Percent
1980-01-01	2.44819000000000030
1981-01-01	3.62461999999999970
1982-01-01	3.75451000000000000
1983-01-01	3.63346999999999950
1984-01-01	2.87883000000000000
1985-01-01	0.21996600000000000
1986-01-01	0.25310500000000000
1987-01-01	0.30853900000000000
1988-01-01	0.23376100000000002
1989-01-01	0.21869400000000000
1990-01-01	8.81657000000000000
1991-01-01	7.21808999999999900
1992-01-01	6.27863000000000100
1993-01-01	5.62284000000000000
1994-01-01	5.29273000000000100
1995-01-01	4.79140000000000000
1996-01-01	4.35935000000000000
1997-01-01	3.87413000000000000
1998-01-01	4.41971000000000000
1999-01-01	6.25036000000000000
2000-01-01	7.50369000000000000
2001-01-01	8.40709000000000000
2002-01-01	9.39580000000000000
2003-01-01	9.72681000000000000
2004-01-01	9.45280000000000000
2005-01-01	8.75701000000000100
2006-01-01	7.87513000000000000
2007-01-01	6.56779000000000000
2008-01-01	5.09594000000000100
2009-01-01	4.32868000000000000
2010-01-01	3.54413000000000040
2011-01-01	3.12902000000000000
2012-01-01	4.95181000000000000
2013-01-01	10.11010000000000000
2014-01-01	11.21690000000000000
2015-01-01	12.36040000000000000
2016-01-01	12.57760000000000000