1984

6.7

1982

6.1

1990

6.9

1939

7.8

2007

6.9

1957

8.1

1955

6.0

2014

5.5

2011

7.3

1969

7.6

1985

7.0

1966

7.0

1921

6.6

1983

7.0

1983

7.0

1982

7.4

1998

7.0

2015

6.4

1923

6.8

1997

6.8