Year	Percent
1973-01-01	38.17080000000000
1974-01-01	37.44540000000000
1975-01-01	36.80870000000000
1976-01-01	36.49230000000000
1977-01-01	36.40410000000000
1978-01-01	35.94640000000000
1979-01-01	35.72740000000000
1980-01-01	35.38370000000000
1981-01-01	33.99670000000000
1982-01-01	33.74430000000000
1983-01-01	35.58050000000000
1984-01-01	35.83660000000000
1985-01-01	39.37130000000000
1986-01-01	44.43550000000000
1987-01-01	46.14860000000000
1988-01-01	48.01290000000000
1989-01-01	55.77530000000000
1990-01-01	63.67490000000000
1991-01-01	66.46390000000000
1992-01-01	66.38210000000000
1993-01-01	67.40850000000000
1994-01-01	68.35270000000000
1995-01-01	70.98450000000000
1996-01-01	72.52430000000000
1997-01-01	74.01480000000000
1998-01-01	77.59470000000000
1999-01-01	82.37830000000000
2000-01-01	85.48920000000000
2001-01-01	86.20980000000000
2002-01-01	86.65290000000000
2003-01-01	90.56840000000000
2004-01-01	94.99160000000000
2005-01-01	98.84000000000000
2006-01-01	104.26100000000001
2007-01-01	109.82900000000000
2008-01-01	116.48700000000001
2009-01-01	125.36700000000000
2010-01-01	123.79899999999999
2011-01-01	121.95900000000000
2012-01-01	124.07400000000000
2013-01-01	124.86300000000000
2014-01-01	127.96300000000000
2015-01-01	135.98000000000000
2016-01-01	140.98600000000000