Year	Percent
1960-01-01	1.0405400000000000
1961-01-01	1.1041200000000000
1962-01-01	1.1762700000000001
1963-01-01	1.1393799999999998
1964-01-01	1.2527400000000000
1965-01-01	1.5222200000000001
1966-01-01	1.6738600000000000
1967-01-01	1.8555800000000000
1968-01-01	1.9373300000000000
1969-01-01	2.0626400000000000
1970-01-01	2.5345700000000000
1971-01-01	3.2933500000000000
1972-01-01	3.4624400000000000
1973-01-01	4.0906600000000000
1974-01-01	4.2158500000000000
1975-01-01	3.9729300000000003
1976-01-01	3.7148199999999996
1977-01-01	4.1392900000000000
1978-01-01	4.8355700000000000
1979-01-01	5.5139900000000000
1980-01-01	7.2265800000000000
1981-01-01	8.0519900000000000
1982-01-01	8.2171899999999990
1983-01-01	7.9912800000000010
1984-01-01	7.3901300000000000
1985-01-01	7.9515000000000000
1986-01-01	9.2356800000000000
1987-01-01	9.6467400000000000
1988-01-01	9.9174800000000000
1989-01-01	11.3156000000000000
1990-01-01	11.7449000000000000
1991-01-01	12.0675000000000000
1992-01-01	12.3404000000000000
1993-01-01	13.2695000000000000
1994-01-01	15.4390000000000000
1995-01-01	19.6009000000000000
1996-01-01	21.5634000000000000
1997-01-01	21.5323000000000000
1998-01-01	25.0950000000000000
1999-01-01	26.5881000000000000
2000-01-01	27.7145000000000000
2001-01-01	27.2552000000000000
2002-01-01	26.4224000000000000
2003-01-01	25.0713000000000000
2004-01-01	25.3642000000000000
2005-01-01	26.6597000000000000
2006-01-01	28.8557000000000000
2007-01-01	32.3276000000000000
2008-01-01	36.6867000000000000
2009-01-01	45.9799000000000000
2010-01-01	51.5728000000000000
2011-01-01	50.3645000000000000
2012-01-01	51.9844000000000000
2013-01-01	54.0299000000000000
2014-01-01	55.5833000000000000
2015-01-01	60.0762000000000000
2016-01-01	70.6606000000000000