1971

7.1

2018

6.9

1993

7.5

1994

4.6

1960

7.3

1982

7.5

1923

7.7

2021

7.1

1968

6.9

1976

7.0

1991

5.9

2015

7.8

1989

5.1

1988

5.2

1977

7.9

2007

4.7

1988

5.8

1945

6.8

1977

6.5

1957

6.9