1978

6.4

1952

7.6

1963

6.7

1964

6.6

1979

8.1

1988

7.4

2016

8.5

2022

7.7

2017

7.2

2022

7.7

2023

8.1

1960

8.4

2019

7.8

1972

8.7

1991

8.3

2020

8.1

1939

7.6

2024

7.2

2019

8.1

1996

7.9