1975

6.3

1972

6.2

1970

5.8

1978

6.3

1976

2.2

1972

5.0

1972

7.5

1977

2.3

1975

6.2

1978

5.1

1993

6.1

1980

7.0

1972

6.3

1973

5.7

1973

7.0

1982

6.1

1982

1.9

1976

7.3

1980

4.6

1978

0.0

1974

4.9

1985

4.0

2000

5.9

1977

5.0

1972

5.6

1976

3.3

1990

4.6

1974

5.3

1976

6.7

1981

5.8

1987

5.6

1992

5.8

1976

6.4

1974

5.3

1971

4.9

1982

5.5

1954

6.8

1973

6.9

1982

6.0

1972

4.1

1978

5.8

1972

6.8

1977

5.7

1971

4.5