1926

6.7

1961

0.0

1986

5.7

1985

6.1

1942

7.0

1953

0.0

1979

7.0

1959

7.9

1997

7.4

1995

7.7

1979

7.7

2000

7.1

1961

7.3

1963

7.0

1964

7.0

1990

8.5

1939

7.9

0.0

1933

0.0

1993

7.7