1918

6.2

1961

7.7

2001

5.2

1940

6.3

1956

6.9

2010

4.7

1996

6.3

1943

7.0

1939

6.6

1937

6.7

1942

6.5

1981

5.5

1953

6.3

1999

6.0

2010

6.8

1928

5.7

1939

6.5

1951

6.7

1953

8.1

1938

7.4