Year	Percent
1964-01-01	26.67740000000000
1965-01-01	25.36510000000000
1966-01-01	25.26260000000000
1967-01-01	27.98540000000000
1968-01-01	29.78630000000000
1969-01-01	30.95020000000000
1970-01-01	30.53810000000000
1971-01-01	33.48990000000000
1972-01-01	36.42750000000000
1973-01-01	35.74710000000000
1974-01-01	34.62290000000000
1975-01-01	34.43160000000000
1976-01-01	36.04870000000000
1977-01-01	37.94560000000000
1978-01-01	37.71330000000000
1979-01-01	36.67060000000000
1980-01-01	38.12690000000000
1981-01-01	38.93170000000000
1982-01-01	41.38340000000000
1983-01-01	46.94370000000000
1984-01-01	52.83080000000000
1985-01-01	57.41240000000000
1986-01-01	59.89540000000000
1987-01-01	60.77600000000000
1988-01-01	60.36240000000000
1989-01-01	62.31990000000000
1990-01-01	66.15660000000000
1991-01-01	70.97890000000000
1992-01-01	73.47490000000000
1993-01-01	77.20920000000000
1994-01-01	78.64200000000000
1995-01-01	78.37270000000000
1996-01-01	81.03130000000000
1997-01-01	91.38280000000000
1998-01-01	106.92100000000000
1999-01-01	109.78900000000000
2000-01-01	108.84500000000000
2001-01-01	109.18900000000000
2002-01-01	105.29200000000000
2003-01-01	104.80200000000000
2004-01-01	104.47300000000000
2005-01-01	100.75299999999999
2006-01-01	96.99840000000000
2007-01-01	91.71680000000000
2008-01-01	92.39370000000000
2009-01-01	92.45430000000000
2010-01-01	84.52150000000000
2011-01-01	89.05150000000000
2012-01-01	94.42380000000000
2013-01-01	103.01500000000000
2014-01-01	107.65299999999999
2015-01-01	108.20500000000000
2016-01-01	108.84600000000000