Year	Percent
1960-01-01	33.64620000000000
1961-01-01	30.02600000000000
1962-01-01	29.46200000000000
1963-01-01	26.26490000000000
1964-01-01	35.05440000000000
1965-01-01	32.21300000000000
1966-01-01	32.60020000000000
1967-01-01	32.37360000000000
1968-01-01	35.03480000000000
1969-01-01	37.38190000000000
1970-01-01	33.58990000000000
1971-01-01	36.46460000000000
1972-01-01	39.05400000000000
1973-01-01	38.12370000000000
1974-01-01	44.25440000000000
1975-01-01	54.03950000000000
1976-01-01	45.19180000000000
1977-01-01	42.76090000000000
1978-01-01	43.63590000000000
1979-01-01	40.41170000000000
1980-01-01	40.71170000000000
1981-01-01	40.24140000000000
1982-01-01	39.56570000000000
1983-01-01	40.42350000000000
1984-01-01	41.70760000000000
1985-01-01	45.08320000000000
1986-01-01	49.78500000000000
1987-01-01	52.78200000000000
1988-01-01	56.35170000000000
1989-01-01	58.46660000000000
1990-01-01	59.27960000000000
1991-01-01	62.08760000000000
1992-01-01	65.57200000000000
1993-01-01	65.75960000000000
1994-01-01	66.26180000000000
1995-01-01	69.25910000000000
1996-01-01	73.08680000000000
1997-01-01	74.76120000000000
1998-01-01	73.63250000000000
1999-01-01	74.97760000000000
2000-01-01	74.46800000000000
2001-01-01	74.97430000000000
2002-01-01	78.39770000000000
2003-01-01	82.06840000000000
2004-01-01	88.71280000000000
2005-01-01	94.71020000000000
2006-01-01	93.30520000000000
2007-01-01	90.84390000000000
2008-01-01	94.74940000000000
2009-01-01	98.43790000000000
2010-01-01	96.63880000000000
2011-01-01	96.33160000000000
2012-01-01	97.02460000000000
2013-01-01	97.33420000000000
2014-01-01	100.17600000000000
2015-01-01	103.86200000000001
2016-01-01	106.51000000000000