1996

6.1

1998

7.2

1989

7.2

1987

6.4

2008

7.0

1990

7.3

1980

6.3

1950

7.7

1933

5.0

2019

10.0

1947

6.7

1989

6.2

1991

6.9

1968

7.4

1943

6.9

1939

6.9

1988

6.2

2002

0.0

1948

0.0

1945

6.9