1983

8.2

1995

8.0

1949

7.0

2000

6.4

1975

5.9

2003

6.3

2021

6.5

2007

7.6

1965

5.4

2001

7.4

2000

5.2

1931

6.9

2017

8.6

2022

9.3

2023

4.5

2014

5.7

2022

8.0

2019

9.0

1941

7.1

1952

7.3