Year	Percent
1960-01-01	23.44670000000000
1961-01-01	16.55190000000000
1962-01-01	11.96250000000000
1963-01-01	10.06350000000000
1964-01-01	8.93374000000000
1965-01-01	8.84463000000000
1966-01-01	8.22869000000000
1967-01-01	8.16288000000000
1968-01-01	7.90475000000000
1969-01-01	8.15440000000000
1970-01-01	6.35804000000000
1971-01-01	7.01520000000000
1972-01-01	6.54866000000000
1973-01-01	3.90150000000000
1974-01-01	2.62792000000000
1975-01-01	4.48782000000000
1976-01-01	5.51663000000000
1977-01-01	10.57850000000000
1978-01-01	15.50110000000000
1979-01-01	19.39290000000000
1980-01-01	29.41020000000000
1981-01-01	40.26190000000000
1982-01-01	54.70000000000000
1983-01-01	56.13860000000000
1984-01-01	54.77720000000000
1985-01-01	51.36740000000000
1986-01-01	45.57300000000000
1987-01-01	41.77820000000000
1988-01-01	39.35580000000000
1989-01-01	41.42530000000000
1990-01-01	43.05720000000000
1991-01-01	42.42460000000000
1992-01-01	45.36480000000000
1993-01-01	51.43670000000000
1994-01-01	55.28790000000000
1995-01-01	54.65990000000000
1996-01-01	58.61790000000000
1997-01-01	59.98710000000000
1998-01-01	61.40170000000000
1999-01-01	63.79940000000000
2000-01-01	64.68840000000000
2001-01-01	68.18330000000000
2002-01-01	70.18390000000000
2003-01-01	71.66620000000000
2004-01-01	70.03950000000000
2005-01-01	71.01030000000000
2006-01-01	70.33450000000000
2007-01-01	75.57190000000000
2008-01-01	86.18570000000000
2009-01-01	94.35160000000000
2010-01-01	93.45550000000000
2011-01-01	95.22960000000000
2012-01-01	99.21540000000000
2013-01-01	101.35600000000001
2014-01-01	103.21100000000000
2015-01-01	105.80700000000000
2016-01-01	108.56299999999999