Year	Percent
1981-01-01	0.09574700000000000
1982-01-01	0.14840500000000000
1983-01-01	0.26040700000000000
1984-01-01	0.26835000000000000
1985-01-01	0.17936900000000000
1986-01-01	0.04693400000000000
1987-01-01	0.13871700000000000
1988-01-01	0.54854399999999990
1989-01-01	0.91807400000000000
1990-01-01	0.82540600000000000
1991-01-01	0.56777100000000000
1992-01-01	0.43557299999999993
1993-01-01	0.33752800000000000
1994-01-01	1.41239000000000000
1995-01-01	2.79833000000000000
1996-01-01	3.10160000000000000
1997-01-01	3.67614000000000000
1998-01-01	4.34312000000000000
1999-01-01	4.65405999999999900
2000-01-01	4.66686999999999900
2001-01-01	4.71020000000000000
2002-01-01	5.09169000000000000
2003-01-01	4.96523000000000000
2004-01-01	4.49525000000000000
2005-01-01	3.86666999999999960
2006-01-01	3.17794000000000000
2007-01-01	2.98985999999999970
2008-01-01	2.05903000000000000
2009-01-01	1.26742000000000000
2010-01-01	1.85069000000000020
2011-01-01	2.51934000000000000
2012-01-01	2.53540000000000000
2013-01-01	2.57649000000000000
2014-01-01	3.07552000000000000
2015-01-01	3.34516999999999950
2016-01-01	3.95039000000000000