1956

6.7

2005

6.3

1955

1.5

2004

6.9

1977

7.2

2005

7.0

1994

6.0

1938

4.3

2001

7.6

1976

7.7

1944

7.0

1942

6.6

1955

7.8

1925

7.1

2002

7.2

1939

7.5

1997

6.7

2004

7.8

1993

7.7

1959

8.0