Year	Percent
1960-01-01	48.03990000000000
1961-01-01	48.27880000000000
1962-01-01	51.66770000000000
1963-01-01	54.16360000000000
1964-01-01	54.55290000000000
1965-01-01	55.74830000000000
1966-01-01	56.81200000000000
1967-01-01	57.81300000000000
1968-01-01	58.82520000000000
1969-01-01	54.66100000000000
1970-01-01	53.00710000000000
1971-01-01	55.60070000000000
1972-01-01	58.88990000000000
1973-01-01	59.46350000000000
1974-01-01	59.70420000000000
1975-01-01	61.48690000000000
1976-01-01	60.38280000000000
1977-01-01	60.36310000000000
1978-01-01	65.06520000000000
1979-01-01	69.36970000000000
1980-01-01	68.86070000000000
1981-01-01	66.74900000000000
1982-01-01	64.45650000000000
1983-01-01	64.42950000000000
1984-01-01	64.91170000000000
1985-01-01	65.32040000000000
1986-01-01	64.59740000000000
1987-01-01	65.31800000000000
1988-01-01	62.75750000000000
1989-01-01	61.22350000000000
1990-01-01	60.28600000000000
1991-01-01	59.00370000000000
1992-01-01	57.02210000000000
1993-01-01	57.99940000000000
1994-01-01	59.00590000000000
1995-01-01	62.11520000000000
1996-01-01	64.88920000000000
1997-01-01	66.28320000000000
1998-01-01	66.28320000000000
1999-01-01	66.28320000000000
2000-01-01	65.26790000000000
2001-01-01	62.23830000000000
2002-01-01	62.89850000000000
2003-01-01	66.62690000000000
2004-01-01	69.61290000000000
2005-01-01	72.26660000000000
2006-01-01	74.89940000000000
2007-01-01	77.93630000000000
2008-01-01	84.67440000000000
2009-01-01	90.61480000000000
2010-01-01	89.50330000000000
2011-01-01	88.14750000000000
2012-01-01	89.04700000000001
2013-01-01	89.87260000000000
2014-01-01	90.12820000000000
2015-01-01	91.20630000000000
2016-01-01	94.04020000000000