Year	Percent
1970-01-01	130.21200000000002
1971-01-01	105.68200000000000
1972-01-01	93.59600000000000
1973-01-01	80.35780000000000
1974-01-01	63.86680000000000
1975-01-01	66.69100000000000
1976-01-01	54.83440000000000
1977-01-01	50.26030000000000
1978-01-01	45.29520000000000
1979-01-01	45.14740000000000
1980-01-01	42.17970000000000
1981-01-01	44.17380000000000
1982-01-01	41.26270000000000
1983-01-01	37.52210000000000
1984-01-01	35.63580000000000
1985-01-01	36.04320000000000
1986-01-01	40.08190000000000
1987-01-01	41.24580000000000
1988-01-01	44.16390000000000
1989-01-01	44.74100000000001
1990-01-01	46.09850000000000
1991-01-01	45.93210000000000
1992-01-01	47.61930000000000
1993-01-01	54.17860000000000
1994-01-01	60.58020000000000
1995-01-01	64.80020000000000
1996-01-01	66.18330000000000
1997-01-01	67.59750000000000
1998-01-01	66.33090000000000
1999-01-01	69.03840000000000
2000-01-01	72.72610000000000
2001-01-01	81.95310000000000
2002-01-01	87.63720000000000
2003-01-01	86.88610000000000
2004-01-01	97.32300000000000
2005-01-01	88.18440000000000
2006-01-01	86.07010000000000
2007-01-01	84.41810000000000
2008-01-01	85.55940000000000
2009-01-01	93.96780000000000
2010-01-01	99.47120000000000
2011-01-01	99.42620000000000
2012-01-01	94.32760000000000
2013-01-01	88.60050000000000
2014-01-01	85.94520000000000
2015-01-01	83.23160000000000
2016-01-01	83.69550000000000