Year	Percent
1962-01-01	5.390510000000000
1963-01-01	7.260680000000001
1964-01-01	7.939189999999999
1965-01-01	8.974700000000000
1966-01-01	9.396960000000000
1967-01-01	9.506240000000000
1968-01-01	12.145100000000000
1969-01-01	13.614800000000000
1970-01-01	13.260200000000000
1971-01-01	10.275000000000000
1972-01-01	12.009600000000000
1973-01-01	13.020600000000000
1974-01-01	9.628830000000000
1975-01-01	12.755999999999998
1976-01-01	17.806200000000000
1977-01-01	26.075800000000000
1978-01-01	32.037200000000000
1979-01-01	26.675500000000000
1980-01-01	30.545900000000000
1981-01-01	44.701800000000000
1982-01-01	65.705500000000000
1983-01-01	72.854700000000000
1984-01-01	69.890500000000000
1985-01-01	72.682900000000000
1986-01-01	92.380100000000000
1987-01-01	80.680100000000000
1988-01-01	90.351200000000000
1989-01-01	74.037200000000000
1990-01-01	74.037200000000000
1991-01-01	26.583900000000000
1992-01-01	16.040800000000000
1993-01-01	15.616700000000000
1994-01-01	19.728800000000000
1995-01-01	25.281400000000000
1996-01-01	29.859900000000000
1997-01-01	40.573600000000000
1998-01-01	57.060200000000000
1999-01-01	53.205400000000000
2000-01-01	43.993200000000000
2001-01-01	52.390800000000000
2002-01-01	54.980500000000000
2003-01-01	53.361000000000004
2004-01-01	51.971200000000000
2005-01-01	46.225800000000000
2006-01-01	45.411600000000000
2007-01-01	53.075600000000000
2008-01-01	55.858100000000000
2009-01-01	78.346600000000000
2010-01-01	73.836200000000000
2011-01-01	59.494900000000000
2012-01-01	54.208100000000000
2013-01-01	57.127100000000000
2014-01-01	65.470100000000000
2015-01-01	94.529800000000000
2016-01-01	102.391000000000000