Year	Percent
1960-01-01	10.532700000000000
1961-01-01	10.272600000000000
1962-01-01	10.285200000000000
1963-01-01	10.810400000000000
1964-01-01	8.172350000000000
1965-01-01	7.857600000000000
1966-01-01	10.231500000000000
1967-01-01	10.284200000000000
1968-01-01	10.076200000000000
1969-01-01	9.361360000000001
1970-01-01	8.829340000000000
1971-01-01	8.492519999999999
1972-01-01	7.579990000000000
1973-01-01	7.101510000000000
1974-01-01	7.252500000000000
1975-01-01	6.941089999999999
1976-01-01	6.808540000000000
1977-01-01	6.248100000000000
1978-01-01	6.130600000000000
1979-01-01	6.483910000000000
1980-01-01	6.567000000000000
1981-01-01	6.062000000000000
1982-01-01	25.566999999999997
1983-01-01	44.634500000000000
1984-01-01	43.707300000000000
1985-01-01	43.383700000000000
1986-01-01	41.662400000000000
1987-01-01	40.816600000000000
1988-01-01	40.627400000000000
1989-01-01	38.668000000000000
1990-01-01	39.533800000000000
1991-01-01	41.979000000000000
1992-01-01	41.840200000000000
1993-01-01	44.616800000000000
1994-01-01	48.424700000000000
1995-01-01	56.585800000000000
1996-01-01	67.088000000000010
1997-01-01	68.324200000000000
1998-01-01	70.287600000000000
1999-01-01	74.255900000000000
2000-01-01	76.667100000000000
2001-01-01	83.396900000000000
2002-01-01	81.604300000000000
2003-01-01	85.145600000000000
2004-01-01	89.275000000000000
2005-01-01	94.578100000000000
2006-01-01	105.934000000000000
2007-01-01	119.846000000000000
2008-01-01	137.336000000000000
2009-01-01	149.357000000000000
2010-01-01	150.475000000000000
2011-01-01	138.843000000000000
2012-01-01	128.807000000000020
2013-01-01	126.952000000000010
2014-01-01	125.802000000000000
2015-01-01	98.157200000000000
2016-01-01	98.539800000000000