1952

6.7

1939

7.8

2006

6.6

1985

6.9

2000

6.9

1979

6.6

1966

6.6

1994

7.5

1995

7.7

1987

6.9

1965

6.4

1955

8.0

1933

6.9

1990

6.3

1924

7.8

1986

6.6

1979

7.1

1995

6.0

1990

6.1

1988

6.1