1990

6.1

1935

7.4

1921

6.8

2001

6.0

1966

6.6

1982

7.4

1961

7.7

1986

6.6

1972

7.9

1952

6.7

1991

4.7

1961

7.9

1948

7.2

1986

6.7

1962

7.3

1980

6.3

1988

6.2

1990

6.5

1984

6.8