1999

6.0

1996

7.5

1971

6.7

2021

6.5

2001

8.9

2024

6.5

1975

6.8

2019

6.8

1920

7.4

2023

6.9

1992

5.7

2006

6.3

1981

7.1

2004

7.2

2020

6.7

2010

7.8

1989

7.3

1970

6.2

2025

5.1

1959

4.3