1987

7.0

1968

6.9

1972

0.0

1973

6.7

1967

6.8

1965

7.6

1965

7.8

1969

6.5

1982

4.7

1960

6.4

1971

5.5

1981

0.0

1963

5.8

1973

6.9

1966

8.0

1966

6.3

1972

5.0

1974

7.6

1973

6.8