Year	Percent
1960-01-01	83.132500000000000
1961-01-01	82.628700000000000
1962-01-01	83.307300000000000
1963-01-01	82.982700000000000
1964-01-01	78.673999999999990
1965-01-01	75.252500000000000
1966-01-01	72.397100000000000
1967-01-01	71.106900000000000
1968-01-01	72.853600000000000
1969-01-01	73.210600000000000
1970-01-01	65.877800000000000
1971-01-01	65.486600000000000
1972-01-01	68.858000000000000
1973-01-01	67.288700000000000
1974-01-01	59.654200000000000
1975-01-01	57.201400000000000
1976-01-01	60.168900000000000
1977-01-01	56.308700000000000
1978-01-01	49.217200000000000
1979-01-01	44.068000000000005
1980-01-01	47.868700000000000
1981-01-01	59.101700000000000
1982-01-01	62.345900000000000
1983-01-01	59.748000000000005
1984-01-01	56.278900000000000
1985-01-01	49.817100000000000
1986-01-01	49.949600000000000
1987-01-01	51.460100000000000
1988-01-01	50.014700000000000
1989-01-01	49.928000000000004
1990-01-01	50.953800000000000
1991-01-01	54.230000000000000
1992-01-01	60.157400000000000
1993-01-01	64.753700000000000
1994-01-01	72.853200000000000
1995-01-01	83.558800000000000
1996-01-01	90.562100000000000
1997-01-01	97.080000000000000
1998-01-01	103.326000000000010
1999-01-01	103.095000000000000
2000-01-01	100.164000000000000
2001-01-01	94.632900000000000
2002-01-01	88.567300000000000
2003-01-01	86.090100000000000
2004-01-01	83.630200000000000
2005-01-01	81.367100000000000
2006-01-01	77.887100000000000
2007-01-01	77.903900000000000
2008-01-01	82.543400000000000
2009-01-01	84.200900000000000
2010-01-01	81.849500000000000
2011-01-01	84.827500000000000
2012-01-01	98.107200000000000
2013-01-01	105.557000000000000
2014-01-01	108.710000000000000
2015-01-01	111.312000000000010
2016-01-01	112.022000000000000