2001

6.4

1970

7.5

2005

7.6

2004

7.9

1977

7.0

1997

8.4

1982

7.6

1966

7.2

1961

8.0

1957

7.8

2001

7.4

1998

8.2

1995

6.9

1942

6.6

1997

7.2

2015

7.2

1978

0.0

1979

6.9

1979

7.4

1987

7.6