1975

6.9

1973

6.3

1977

6.8

1976

4.1

1976

6.1

1977

6.3

1978

7.0

1977

6.0

1977

6.5

1978

6.4

1977

6.8

1978

6.1

1972

5.6

1979

6.7

1977

1.0

1978

5.7

1980

5.8

1978

0.0

1979

7.0

1984

6.7

1979

6.5

1978

6.0

1978

6.5

1974

6.3

1982

6.7

1974

5.8

1978

6.4

1978

6.1

1978

7.5

1978

7.4

1977

5.9

1972

6.7

1972

6.2

1979

0.0

1977

6.1

1979

6.4

1976

6.7

1977

6.5

1975

6.7

1978

6.5

1972

6.7

1980

6.0

1974

5.0

2005

0.0