Year	Percent
1960-01-01	91.86080000000000
1961-01-01	95.81840000000000
1962-01-01	98.20120000000000
1963-01-01	94.46340000000000
1964-01-01	90.50810000000000
1965-01-01	89.80750000000000
1966-01-01	91.04610000000000
1967-01-01	89.41910000000000
1968-01-01	87.29390000000000
1969-01-01	88.00690000000000
1970-01-01	91.01010000000000
1971-01-01	92.44780000000000
1972-01-01	90.94060000000000
1973-01-01	90.40950000000000
1974-01-01	91.47880000000000
1975-01-01	102.25299999999999
1976-01-01	114.98299999999999
1977-01-01	118.16400000000000
1978-01-01	117.73400000000000
1979-01-01	105.12299999999999
1980-01-01	93.83740000000000
1981-01-01	88.89730000000000
1982-01-01	86.66180000000000
1983-01-01	87.60280000000000
1984-01-01	86.61300000000000
1985-01-01	78.71040000000000
1986-01-01	72.01400000000000
1987-01-01	68.41230000000000
1988-01-01	65.47620000000000
1989-01-01	64.03740000000000
1990-01-01	65.10600000000001
1991-01-01	67.24380000000000
1992-01-01	68.25080000000000
1993-01-01	68.83370000000000
1994-01-01	69.44930000000000
1995-01-01	73.30970000000000
1996-01-01	80.85980000000000
1997-01-01	90.19040000000000
1998-01-01	103.99000000000000
1999-01-01	120.64900000000000
2000-01-01	141.23000000000000
2001-01-01	134.74700000000000
2002-01-01	141.62700000000000
2003-01-01	149.90900000000000
2004-01-01	152.61100000000000
2005-01-01	153.81700000000000
2006-01-01	159.28400000000000
2007-01-01	170.78599999999997
2008-01-01	174.10400000000000
2009-01-01	181.06200000000000
2010-01-01	187.14700000000002
2011-01-01	182.68300000000000
2012-01-01	184.25300000000000
2013-01-01	180.66700000000000
2014-01-01	166.36700000000002
2015-01-01	152.58400000000000
2016-01-01	138.02600000000000