Year	Percent
1961-01-01	7.1829800000000010
1962-01-01	7.5369399999999995
1963-01-01	9.0011700000000000
1964-01-01	9.3943700000000000
1965-01-01	8.5154100000000010
1966-01-01	7.3807700000000000
1967-01-01	7.5498699999999990
1968-01-01	8.2414399999999990
1969-01-01	8.7069500000000000
1970-01-01	10.0122000000000000
1971-01-01	10.8421000000000000
1972-01-01	11.6965000000000000
1973-01-01	13.1313000000000000
1974-01-01	13.0350000000000000
1975-01-01	12.9371000000000000
1976-01-01	13.3992000000000000
1977-01-01	14.2913000000000000
1978-01-01	16.8289000000000000
1979-01-01	17.1020000000000000
1980-01-01	13.7452000000000000
1981-01-01	10.6418000000000000
1982-01-01	9.6320500000000000
1983-01-01	8.8797300000000000
1984-01-01	8.6080600000000000
1985-01-01	8.9480600000000000
1986-01-01	9.0280300000000010
1987-01-01	8.4387300000000000
1988-01-01	7.9094200000000000
1989-01-01	12.5708000000000000
1990-01-01	12.5708000000000000
1991-01-01	27.7557000000000000
1992-01-01	55.7991000000000000
1993-01-01	87.3027000000000000
1994-01-01	132.3520000000000000
1995-01-01	147.9020000000000200
1996-01-01	72.5885000000000000
1997-01-01	23.3346000000000000
1998-01-01	171.1430000000000000
1999-01-01	231.8970000000000200
2000-01-01	112.7560000000000000
2001-01-01	126.7410000000000000
2002-01-01	157.1720000000000000
2003-01-01	221.4920000000000200
2004-01-01	222.5750000000000000
2005-01-01	260.2009999999999600
2006-01-01	314.4980000000000000
2007-01-01	378.7920000000000000
2008-01-01	528.8640000000000000
2009-01-01	724.3470000000000000
2010-01-01	906.3830000000000000
2011-01-01	14.3439000000000000
2012-01-01	14.9720000000000010
2013-01-01	16.6653000000000000