2001

7.2

2014

5.8

2011

7.1

1974

5.7

1988

5.8

1978

8.0

1972

6.7

1954

7.0

1985

7.9

2011

9.7

1949

6.9

2023

7.0

1962

7.6

1949

7.6

2009

5.6

2011

7.3

1986

6.6

2021

7.4

2017

6.3

1940

7.0