Year	Percent
1965-01-01	61.63000000000000
1966-01-01	60.55460000000000
1967-01-01	61.88700000000000
1968-01-01	68.02090000000000
1969-01-01	74.16880000000000
1970-01-01	77.31960000000000
1971-01-01	82.52000000000000
1972-01-01	82.40520000000000
1973-01-01	64.33920000000000
1974-01-01	56.88270000000000
1975-01-01	60.78390000000000
1976-01-01	72.93820000000000
1977-01-01	79.65810000000000
1978-01-01	83.53880000000000
1979-01-01	125.25200000000001
1980-01-01	121.68000000000000
1981-01-01	105.95400000000000
1982-01-01	96.27870000000000
1983-01-01	101.94800000000000
1984-01-01	87.52770000000000
1985-01-01	69.34410000000000
1986-01-01	63.72220000000000
1987-01-01	49.62010000000000
1988-01-01	40.79790000000000
1989-01-01	51.64670000000000
1990-01-01	63.90690000000000
1991-01-01	70.16160000000000
1992-01-01	76.70070000000000
1993-01-01	65.61630000000000
1994-01-01	54.64050000000000
1995-01-01	49.60160000000000
1996-01-01	34.58670000000000
1997-01-01	32.90830000000000
1998-01-01	40.54680000000000
1999-01-01	41.83140000000000
2000-01-01	39.46160000000000
2001-01-01	37.50370000000000
2002-01-01	34.11180000000000
2003-01-01	34.29410000000000
2004-01-01	37.28560000000000
2005-01-01	40.46160000000000
2006-01-01	50.18500000000000
2007-01-01	54.91210000000000
2008-01-01	56.68230000000000
2009-01-01	62.44730000000000
2010-01-01	68.90770000000000
2011-01-01	67.68550000000000
2012-01-01	65.08100000000000
2013-01-01	60.84790000000000
2014-01-01	56.35570000000000
2015-01-01	57.50390000000000
2016-01-01	56.44630000000000