1986

4.0

1981

4.4

1983

4.6

1963

5.0

1962

6.7

1976

6.8

1978

7.8

1967

6.0

1983

5.0

1976

7.8

1983

6.0

1967

6.8

1962

5.3

1981

2.7

1982

4.4

1955

5.5

1974

6.4

1962

7.9

1954

6.2

1959

5.4

1967

7.8