1978

7.4

1964

7.3

1953

7.3

1944

7.0

1968

5.8

2006

6.7

2023

6.0

2018

6.6

1967

6.5

1933

5.5

1949

6.7

1953

6.1

2009

6.7

2014

5.3

1930

4.7

1964

6.3

1951

6.0

1953

6.3

2005

7.2

1992

6.2