1994

7.1

1968

6.9

1969

5.0

1970

2.0

1984

7.3

1987

5.5

1975

6.7

1967

7.5

1978

0.0

1977

2.9

1961

4.8

1972

7.0

1984

4.4

1962

7.4

1983

3.0