Year	Percent
1960-01-01	2.92902000000000000
1961-01-01	2.94545000000000000
1962-01-01	2.86615000000000000
1963-01-01	2.65465000000000000
1964-01-01	2.52543000000000000
1965-01-01	2.23752000000000000
1966-01-01	2.22032000000000000
1967-01-01	2.35290000000000000
1968-01-01	2.15715000000000000
1969-01-01	2.00318000000000000
1970-01-01	1.67754000000000030
1971-01-01	1.31869000000000000
1972-01-01	1.22621000000000000
1973-01-01	1.01780000000000000
1974-01-01	0.83905100000000000
1975-01-01	1.06785000000000000
1976-01-01	1.23518000000000000
1977-01-01	1.03417999999999990
1978-01-01	0.96276700000000000
1979-01-01	0.95945000000000000
1980-01-01	0.86380499999999990
1981-01-01	0.58782600000000010
1982-01-01	0.50944400000000000
1983-01-01	0.79192400000000000
1984-01-01	1.15909000000000000
1985-01-01	1.29067999999999980
1986-01-01	1.15110000000000000
1987-01-01	1.15448000000000000
1988-01-01	1.08590000000000000
1989-01-01	0.96473400000000000
1990-01-01	1.04366000000000000
1991-01-01	1.13487000000000000
1992-01-01	1.19446000000000000
1993-01-01	1.19878000000000000
1994-01-01	1.00485000000000000
1995-01-01	0.88117800000000000
1996-01-01	0.85812900000000010
1997-01-01	0.87163099999999990
1998-01-01	0.80943400000000000
1999-01-01	0.56315200000000010
2000-01-01	0.30701700000000000
2001-01-01	0.26108300000000000
2002-01-01	0.24258100000000000
2003-01-01	0.27491000000000000
2004-01-01	0.33116200000000000
2005-01-01	0.37032200000000000
2006-01-01	0.40518899999999997
2007-01-01	0.44702400000000000
2008-01-01	0.61945000000000000
2009-01-01	0.82894500000000000
2010-01-01	1.00777000000000000
2011-01-01	1.61185000000000000
2012-01-01	2.48515000000000000
2013-01-01	2.54767000000000000
2014-01-01	2.09816000000000000
2015-01-01	3.93390000000000000
2016-01-01	9.13053000000000000