1937

5.3

1971

5.8

1941

5.2

1988

6.7

2004

6.5

2000

6.4

1955

7.4

1953

6.9

2002

6.1

2010

4.0

1997

6.9

2007

6.8

1932

6.8

1930

6.9

1943

2.2

1969

10.0

1944

0.0

1967

6.4

1958

6.2

2006

5.9