1982

6.4

1988

7.5

1991

7.3

2006

5.8

1989

6.0

2001

7.9

1932

7.4

1990

7.5

1942

7.8

2001

5.4

1944

7.6

1974

7.7

2006

7.5

1940

7.9

1983

7.0

2013

5.5

1944

5.0

1938

6.5