1959

7.9

2003

7.0

2004

6.4

1987

6.0

2013

5.0

1975

7.5

1980

6.2

1991

7.7

2011

5.7

1950

7.0

1957

6.3

1997

4.8

1946

5.0

1919

7.5

1985

6.6

2018

5.8

1988

6.9

1996

6.5

1940

7.1

2006

5.8