1978

6.2

1984

7.6

1974

4.0

1972

0.0

1980

3.0

1970

3.7

1990

6.2

1984

7.5

1973

2.0

1988

4.9

1976

8.6

1988

2.5

1982

6.3

1973

6.4

1971

7.1

1974

7.2

1973

7.2