Year	Percent
1973-01-01	81.71460000000000
1974-01-01	68.29110000000000
1975-01-01	67.32580000000000
1976-01-01	68.03350000000000
1977-01-01	88.40930000000000
1978-01-01	117.35100000000000
1979-01-01	126.30900000000000
1980-01-01	123.23200000000001
1981-01-01	115.44500000000000
1982-01-01	108.13500000000000
1983-01-01	101.65299999999999
1984-01-01	86.36790000000000
1985-01-01	73.91160000000000
1986-01-01	73.10870000000000
1987-01-01	75.01240000000000
1988-01-01	76.86650000000000
1989-01-01	77.61010000000000
1990-01-01	82.14630000000000
1991-01-01	84.51350000000000
1992-01-01	82.69020000000000
1993-01-01	87.61550000000000
1994-01-01	93.09920000000000
1995-01-01	94.99170000000000
1996-01-01	97.13410000000000
1997-01-01	100.73899999999999
1998-01-01	108.04000000000000
1999-01-01	111.69900000000000
2000-01-01	106.14700000000000
2001-01-01	95.25110000000000
2002-01-01	89.76810000000000
2003-01-01	89.15770000000000
2004-01-01	88.18120000000000
2005-01-01	91.80150000000000
2006-01-01	102.19200000000001
2007-01-01	99.91820000000000
2008-01-01	110.30000000000000
2009-01-01	116.61700000000000
2010-01-01	108.79700000000001
2011-01-01	105.16700000000000
2012-01-01	103.17200000000001
2013-01-01	92.89460000000000
2014-01-01	87.07320000000000
2015-01-01	89.65270000000000
2016-01-01	92.63250000000000