Year	Percent
1976-01-01	147.54399999999998
1977-01-01	140.37800000000000
1978-01-01	125.13700000000000
1979-01-01	120.46500000000000
1980-01-01	138.80400000000000
1981-01-01	148.01600000000000
1982-01-01	140.81200000000000
1983-01-01	112.82900000000000
1984-01-01	106.97100000000000
1985-01-01	103.71200000000000
1986-01-01	102.88200000000000
1987-01-01	111.36800000000000
1988-01-01	136.82399999999998
1989-01-01	157.87700000000000
1990-01-01	183.57200000000000
1991-01-01	188.87800000000000
1992-01-01	179.48700000000000
1993-01-01	39.85350000000000
1994-01-01	35.15930000000000
1995-01-01	41.00850000000000
1996-01-01	44.27690000000000
1997-01-01	47.62460000000000
1998-01-01	54.89060000000000
1999-01-01	69.11850000000000
2000-01-01	74.18530000000000
2001-01-01	69.45090000000000
2002-01-01	66.91510000000000
2003-01-01	66.18610000000000
2004-01-01	65.82610000000000
2005-01-01	62.42530000000000
2006-01-01	61.76110000000000
2007-01-01	63.09040000000000
2008-01-01	68.82940000000000
2009-01-01	77.36060000000000
2010-01-01	81.20260000000000
2011-01-01	85.98860000000000
2012-01-01	86.33380000000000
2013-01-01	79.14300000000000
2014-01-01	72.58310000000000
2015-01-01	67.73930000000000
2016-01-01	64.17370000000000