1983

7.8

1992

5.2

2007

0.0

1977

6.8

1984

7.1

1978

6.5

1955

6.6

1992

6.5

1983

6.4

1975

5.4

1972

7.9

1967

6.7

1975

7.4

1995

6.0

1971

5.0

1988

4.7

1985

7.2

1993

6.6

2001

8.0

1993

7.0

1980

6.5

1983

7.5

1977

7.2

1974

6.4

1991

6.5

1977

7.7

1975

7.0