Year	Percent
1975-01-01	34.03070000000000
1976-01-01	29.57260000000000
1977-01-01	31.91650000000000
1978-01-01	35.24680000000000
1979-01-01	44.00230000000000
1980-01-01	47.97080000000000
1981-01-01	47.89960000000000
1982-01-01	49.88480000000000
1983-01-01	56.49110000000000
1984-01-01	64.37590000000000
1985-01-01	69.35010000000000
1986-01-01	65.63090000000000
1987-01-01	70.33000000000000
1988-01-01	71.62380000000000
1989-01-01	79.55850000000000
1990-01-01	73.29760000000000
1991-01-01	74.05250000000000
1992-01-01	64.29640000000000
1993-01-01	70.23230000000000
1994-01-01	73.88170000000000
1995-01-01	75.55430000000000
1996-01-01	80.83760000000000
1997-01-01	79.52350000000000
1998-01-01	78.57620000000000
1999-01-01	83.37970000000000
2000-01-01	86.40240000000000
2001-01-01	89.53770000000000
2002-01-01	90.41450000000000
2003-01-01	86.89020000000000
2004-01-01	85.66490000000000
2005-01-01	96.36330000000000
2006-01-01	101.84700000000001
2007-01-01	107.14299999999999
2008-01-01	105.02700000000000
2009-01-01	102.16700000000000
2010-01-01	99.16860000000000
2011-01-01	101.62200000000001
2012-01-01	107.49799999999999
2013-01-01	110.30600000000000
2014-01-01	111.57799999999999
2015-01-01	110.31500000000000
2016-01-01	111.73400000000000