1931

5.8

2009

7.2

1984

7.3

1992

6.9

1989

7.3

1991

6.7

1979

6.1

2021

6.0

2007

7.7

1999

7.7

2012

6.9

1955

7.9

1966

8.2

1987

7.5

1960

7.2

1968

7.6

1949

6.8

1950

8.3

1985

6.2

1973

7.0