1968

7.1

1961

4.7

1987

0.0

1965

5.6

1966

6.6

1968

7.1

1959

5.2

1965

6.3

1960

6.5

1959

8.0

1957

7.7

1961

0.0

1963

7.2

1967

6.8

1962

6.4

1969

3.5

1961

3.7