Year	Percent
1973-01-01	31.85440000000000
1974-01-01	32.58220000000000
1975-01-01	33.75360000000000
1976-01-01	38.50950000000000
1977-01-01	43.98880000000000
1978-01-01	46.33330000000000
1979-01-01	46.95010000000000
1980-01-01	47.85820000000000
1981-01-01	47.79230000000000
1982-01-01	50.55970000000000
1983-01-01	56.96300000000000
1984-01-01	64.02140000000000
1985-01-01	68.81790000000000
1986-01-01	70.24320000000000
1987-01-01	69.67940000000000
1988-01-01	70.63550000000000
1989-01-01	75.13730000000000
1990-01-01	81.58630000000000
1991-01-01	88.97130000000000
1992-01-01	94.79010000000000
1993-01-01	104.85700000000001
1994-01-01	118.50800000000000
1995-01-01	130.76700000000000
1996-01-01	142.09799999999998
1997-01-01	160.01300000000000
1998-01-01	170.65599999999998
1999-01-01	150.76000000000000
2000-01-01	127.77900000000000
2001-01-01	112.70600000000000
2002-01-01	107.66100000000000
2003-01-01	107.35700000000001
2004-01-01	105.75600000000000
2005-01-01	104.49500000000000
2006-01-01	99.59780000000000
2007-01-01	94.77980000000000
2008-01-01	97.42460000000000
2009-01-01	101.11600000000000
2010-01-01	97.73710000000000
2011-01-01	106.65899999999999
2012-01-01	111.90899999999999
2013-01-01	119.09600000000000
2014-01-01	125.67800000000000
2015-01-01	127.31800000000000
2016-01-01	126.29000000000000