1977

7.7

1971

6.7

1989

7.4

1992

5.9

1989

6.3

1997

7.3

1953

0.0

1987

6.4

1997

6.7

1988

4.8

1990

7.4

1998

5.7

1950

6.0

1986

7.2

1958

5.3

1990

6.2

1958

6.8

1987

7.0

1993

5.3

1954

4.5

1973

6.2