Year	Percent
1973-01-01	68.51500000000000
1974-01-01	70.90760000000000
1975-01-01	80.18710000000000
1976-01-01	75.47170000000000
1977-01-01	74.29410000000000
1978-01-01	75.44930000000000
1979-01-01	71.06340000000000
1980-01-01	66.55230000000000
1981-01-01	63.01790000000000
1982-01-01	61.68930000000000
1983-01-01	62.35690000000000
1984-01-01	62.90170000000000
1985-01-01	63.58210000000000
1986-01-01	63.01980000000000
1987-01-01	62.26150000000000
1988-01-01	61.13270000000000
1989-01-01	63.10700000000000
1990-01-01	64.56290000000000
1991-01-01	68.59020000000000
1992-01-01	75.52920000000000
1993-01-01	80.29260000000000
1994-01-01	79.21410000000000
1995-01-01	75.53340000000000
1996-01-01	73.26580000000000
1997-01-01	71.91440000000000
1998-01-01	71.68780000000000
1999-01-01	82.29390000000000
2000-01-01	89.00620000000000
2001-01-01	75.74690000000000
2002-01-01	75.57920000000000
2003-01-01	78.07310000000000
2004-01-01	80.36860000000000
2005-01-01	83.02310000000000
2006-01-01	86.31550000000000
2007-01-01	95.97550000000000
2008-01-01	107.31299999999999
2009-01-01	114.23899999999999
2010-01-01	119.08400000000000
2011-01-01	123.88300000000000
2012-01-01	130.56799999999998
2013-01-01	133.44100000000000
2014-01-01	131.51100000000000
2015-01-01	128.69700000000000
2016-01-01	124.71600000000001