1970

6.4

1950

6.7

1956

6.8

1966

6.2

1973

6.1

1973

6.3

1968

6.4

2019

5.4

1973

5.3

1933

5.2

2020

8.0

1958

6.2

1970

6.7

1980

6.4

1969

7.3

1971

6.9

1972

7.1

1976

7.1

1962

7.8

1981

7.2