Year	Percent
1960-01-01	46.491400000000000
1961-01-01	42.376999999999995
1962-01-01	39.073400000000000
1963-01-01	37.354300000000000
1964-01-01	32.533000000000000
1965-01-01	29.169400000000000
1966-01-01	30.055400000000000
1967-01-01	32.994600000000000
1968-01-01	36.447300000000000
1969-01-01	33.893900000000000
1970-01-01	30.462600000000000
1971-01-01	28.020400000000000
1972-01-01	28.225700000000000
1973-01-01	26.067900000000000
1974-01-01	27.300800000000000
1975-01-01	25.125800000000000
1976-01-01	23.304000000000002
1977-01-01	21.294200000000000
1978-01-01	20.981700000000000
1979-01-01	21.323500000000000
1980-01-01	21.702100000000000
1981-01-01	23.322200000000000
1982-01-01	26.329800000000000
1983-01-01	31.163200000000000
1984-01-01	33.823700000000000
1985-01-01	34.467100000000000
1986-01-01	31.465700000000000
1987-01-01	30.540500000000000
1988-01-01	35.272500000000000
1989-01-01	39.347400000000000
1990-01-01	41.404300000000000
1991-01-01	41.531200000000000
1992-01-01	45.196900000000000
1993-01-01	46.475100000000000
1994-01-01	44.247200000000000
1995-01-01	44.762000000000000
1996-01-01	45.942900000000000
1997-01-01	54.763100000000000
1998-01-01	60.623000000000005
1999-01-01	64.887700000000000
2000-01-01	80.204000000000000
2001-01-01	90.788500000000000
2002-01-01	96.981400000000000
2003-01-01	112.571000000000000
2004-01-01	135.916000000000000
2005-01-01	192.658000000000000
2006-01-01	263.268000000000000
2007-01-01	261.464000000000000
2008-01-01	211.424000000000000
2009-01-01	183.567000000000000
2010-01-01	169.180999999999980
2011-01-01	149.819000000000000
2012-01-01	129.380000000000000
2013-01-01	113.480000000000000
2014-01-01	101.052000000000000
2015-01-01	89.380300000000000
2016-01-01	84.259200000000000