1974

6.1

1988

6.3

1978

6.5

1982

7.5

1956

6.7

2008

6.0

2010

4.9

1975

3.0

1969

6.8

1941

5.8

1944

0.0

1956

5.9

1926

6.4

2007

5.2

1999

4.6

1956

0.0

1935

0.0

1999

6.4

1981

6.9

2018

6.0