1998

7.2

1987

6.4

1990

7.3

1980

6.3

1950

7.7

1947

6.7

1989

6.2

1991

6.9

1943

6.9

1939

6.9

1988

6.2

2002

0.0

1948

0.0

1945

6.9

1935

6.3

2000

6.4

1963

0.0

1968

0.0

1955

2.0

1959

8.0