1989

6.6

1954

5.9

1966

6.5

2004

6.1

1975

5.9

1994

5.2

2015

6.9

2004

7.8

1976

4.2

1949

6.2

1980

6.4

1988

5.4

2007

3.6

1940

5.0

1979

6.1

2004

5.8

2019

1.0

1986

6.1

1987

6.9

1953

6.8