Year	Percent
1960-01-01	33.347600000000000
1961-01-01	33.513000000000005
1962-01-01	36.151100000000000
1963-01-01	41.614200000000000
1964-01-01	49.991900000000000
1965-01-01	43.645000000000000
1966-01-01	45.025500000000000
1967-01-01	44.448500000000000
1968-01-01	48.803999999999995
1969-01-01	45.609900000000000
1970-01-01	47.544200000000000
1971-01-01	46.976500000000000
1972-01-01	49.574200000000000
1973-01-01	52.838700000000000
1974-01-01	66.738800000000000
1975-01-01	82.004800000000000
1976-01-01	70.725300000000000
1977-01-01	66.360200000000000
1978-01-01	63.573200000000000
1979-01-01	59.368300000000000
1980-01-01	57.889200000000000
1981-01-01	58.258900000000000
1982-01-01	58.663200000000000
1983-01-01	60.945500000000000
1984-01-01	58.485600000000000
1985-01-01	59.881800000000000
1986-01-01	61.084700000000000
1987-01-01	61.935700000000000
1988-01-01	78.830300000000000
1989-01-01	95.691200000000000
1990-01-01	99.303700000000000
1991-01-01	109.217999999999990
1992-01-01	108.825000000000000
1993-01-01	119.231000000000010
1994-01-01	122.940000000000000
1995-01-01	111.626000000000000
1996-01-01	120.839000000000000
1997-01-01	128.417000000000000
1998-01-01	130.725000000000000
1999-01-01	136.630000000000000
2000-01-01	142.992000000000020
2001-01-01	146.964000000000000
2002-01-01	89.559400000000000
2003-01-01	90.957600000000000
2004-01-01	88.527100000000000
2005-01-01	113.737000000000010
2006-01-01	141.972000000000000
2007-01-01	150.652000000000020
2008-01-01	192.477000000000000
2009-01-01	198.925000000000000
2010-01-01	206.658000000000000
2011-01-01	209.923000000000000
2012-01-01	207.923000000000000
2013-01-01	196.020000000000000
2014-01-01	176.105000000000000
2015-01-01	175.044000000000000