1922

6.2

2000

7.2

1935

7.4

1955

6.0

1948

7.6

1968

6.9

1982

7.3

2020

6.9

1939

5.0

1924

6.5

2004

7.1

1974

7.3

2000

8.0

1972

7.7

1966

7.8

1999

7.1

2011

7.1

1950

6.8

1990

7.0

1992

4.4