1981

10.0

2014

8.2

1977

8.1

1995

7.2

1998

7.5

1984

8.5

1972

7.7

1980

6.5

2021

6.9

1967

7.7

1997

6.7

2018

8.2

2018

8.1

1998

7.2

1962

7.3

1965

7.3

2023

8.4

2022

8.0

2018

8.4

2019

8.0