1965

5.0

1958

6.4

1960

7.6

1970

5.5

1968

6.0

1978

6.2

1964

8.0

1987

6.6

1956

7.3

1957

0.0

1984

4.0

1968

0.0

1978

6.4

1963

7.0

1969

3.5

1961

0.0

1972

6.4

1978

7.2

1982

7.0

1978

5.7

1996

8.7