Year	Percent
1964-01-01	13.948000000000000
1965-01-01	13.505800000000000
1966-01-01	13.514600000000000
1967-01-01	15.069300000000000
1968-01-01	16.121800000000000
1969-01-01	17.013400000000000
1970-01-01	17.811500000000000
1971-01-01	19.637500000000000
1972-01-01	19.938700000000000
1973-01-01	20.118100000000000
1974-01-01	22.060300000000000
1975-01-01	24.091500000000000
1976-01-01	28.602300000000000
1977-01-01	33.791200000000000
1978-01-01	36.795400000000000
1979-01-01	38.190500000000000
1980-01-01	38.663400000000000
1981-01-01	38.131400000000000
1982-01-01	39.939200000000000
1983-01-01	45.577200000000000
1984-01-01	51.273500000000000
1985-01-01	54.267400000000000
1986-01-01	53.843999999999994
1987-01-01	52.630700000000000
1988-01-01	55.085300000000000
1989-01-01	61.198000000000000
1990-01-01	69.776700000000000
1991-01-01	78.832400000000000
1992-01-01	86.156300000000000
1993-01-01	96.966400000000000
1994-01-01	111.397000000000000
1995-01-01	124.825000000000000
1996-01-01	136.646000000000020
1997-01-01	154.853999999999980
1998-01-01	163.210000000000000
1999-01-01	138.734000000000000
2000-01-01	113.215000000000000
2001-01-01	97.151400000000000
2002-01-01	91.771300000000000
2003-01-01	91.636100000000000
2004-01-01	90.971600000000000
2005-01-01	91.155900000000000
2006-01-01	87.798999999999990
2007-01-01	84.134600000000000
2008-01-01	87.073900000000000
2009-01-01	89.790700000000000
2010-01-01	86.178900000000000
2011-01-01	94.999700000000000
2012-01-01	100.057000000000000
2013-01-01	106.697000000000000
2014-01-01	112.627999999999990
2015-01-01	113.315000000000000
2016-01-01	112.814000000000000