1974

7.9

1988

7.5

2003

7.7

2017

6.4

1996

7.7

1971

6.8

1995

8.2

1946

7.6

1941

7.7

1972

6.2

1988

6.0

2016

5.9

1972

7.0

1983

6.1

1954

6.8

1981

7.4

1976

7.2

1934

5.5

1931

6.0

1946

6.0