1976

6.8

1980

5.5

1978

6.3

1972

5.0

1976

6.8

1981

6.9

1976

7.2

1977

4.3

2016

6.4

1990

7.4

1971

10.0

1973

6.6

1967

0.0

1998

6.2

1982

4.8

1970

6.0

2016

6.3