1983

7.2

1993

7.0

2017

7.6

1998

4.8

1970

7.3

1985

7.2

1936

7.6

1981

6.5

1988

6.7

1963

7.3

1975

2.7

2007

5.0

1976

7.2

1967

6.1

2006

6.0

1950

5.6

1933

0.0

1937

6.0

1938

5.2

1937

6.2