Year	Percent
1980-01-01	0.24702399999999997
1981-01-01	0.24168200000000000
1982-01-01	0.23225100000000000
1983-01-01	0.22019499999999997
1984-01-01	0.41975600000000000
1985-01-01	0.40941600000000000
1986-01-01	0.49779600000000000
1987-01-01	0.40804700000000000
1988-01-01	0.60795400000000000
1989-01-01	0.32089300000000000
1990-01-01	0.43672500000000000
1991-01-01	0.27790600000000000
1992-01-01	0.37946700000000000
1993-01-01	0.36129400000000000
1994-01-01	1.99610999999999980
1995-01-01	1.17456000000000000
1996-01-01	1.38211000000000000
1997-01-01	1.13673000000000000
1998-01-01	0.69419900000000000
1999-01-01	0.65954399999999990
2000-01-01	0.84844100000000000
2001-01-01	2.33855000000000000
2002-01-01	2.51675000000000000
2003-01-01	3.01078000000000000
2004-01-01	2.87877000000000030
2005-01-01	4.29125000000000000
2006-01-01	3.73858000000000020
2007-01-01	4.00104000000000000
2008-01-01	3.09429000000000000
2009-01-01	3.29395999999999980
2010-01-01	3.15449000000000000
2011-01-01	3.55409000000000000
2012-01-01	3.15355000000000000
2013-01-01	4.21854000000000000
2014-01-01	6.34863000000000000
2015-01-01	6.69080000000000000
2016-01-01	8.27191000000000000