1981

3.0

1976

5.0

1976

10.0

1981

4.1

1989

4.8

1976

5.9

1979

6.8

1975

3.9

1985

6.6

1984

7.3

1985

3.0

1971

5.5

1984

6.1

1982

5.2

1980

6.4