Year	Percent
1960-01-01	71.87500000000000
1961-01-01	88.92430000000000
1962-01-01	103.84100000000001
1963-01-01	136.47000000000000
1964-01-01	197.61300000000000
1965-01-01	231.64700000000002
1966-01-01	230.36900000000003
1967-01-01	212.56300000000000
1968-01-01	177.81799999999998
1969-01-01	179.44799999999998
1970-01-01	185.34799999999998
1971-01-01	163.69100000000000
1972-01-01	161.15700000000000
1973-01-01	146.26400000000000
1974-01-01	158.62800000000000
1975-01-01	174.67400000000000
1976-01-01	176.69900000000000
1977-01-01	205.23600000000000
1978-01-01	217.51200000000000
1979-01-01	205.78700000000000
1980-01-01	195.85900000000000
1981-01-01	178.50700000000000
1982-01-01	172.14200000000000
1983-01-01	166.19700000000000
1984-01-01	141.76000000000000
1985-01-01	138.11900000000000
1986-01-01	145.50300000000000
1987-01-01	133.19100000000000
1988-01-01	123.43200000000000
1989-01-01	130.07700000000000
1990-01-01	146.58200000000000
1991-01-01	132.27100000000002
1992-01-01	104.23700000000001
1993-01-01	92.42590000000000
1994-01-01	71.19020000000000
1995-01-01	53.10870000000000
1996-01-01	55.51430000000000
1997-01-01	77.66130000000000
1998-01-01	96.10290000000000
1999-01-01	91.90010000000000
2000-01-01	87.89120000000000
2001-01-01	91.10950000000000
2002-01-01	94.23950000000000
2003-01-01	93.69810000000000
2004-01-01	93.68940000000000
2005-01-01	106.43200000000000
2006-01-01	116.56100000000000
2007-01-01	106.06500000000000
2008-01-01	101.08300000000000
2009-01-01	93.46890000000000
2010-01-01	79.21000000000000
2011-01-01	76.26310000000000
2012-01-01	80.41820000000000
2013-01-01	87.52950000000000
2014-01-01	94.99320000000000
2015-01-01	93.84750000000000
2016-01-01	85.73120000000000