1967

6.5

1988

5.4

2014

5.9

1993

6.6

1975

4.5

2020

7.4

2015

6.4

2022

7.8

1981

6.5

2022

6.4

1971

6.8

1996

5.9

1974

6.3

2021

6.6

1966

6.5

1964

7.1

2022

6.6

2020

8.4

2022

5.5

2023

6.7