1965

4.0

1976

7.3

1959

7.5

1976

6.8

1960

4.6

1966

6.7

1985

4.9

1984

7.4

1993

7.6

1989

5.3

1966

5.8

1988

4.4

1989

7.4

1957

7.7

1970

6.8

1968

6.8

1965

4.0

1967

6.8

1963

5.2

1980

0.0