1970

7.0

2020

6.4

1975

7.0

2018

6.3

2022

5.2

2024

5.6

2023

6.8

1998

5.7

1985

6.1

2015

6.6

2024

6.6

2023

5.4

2021

6.7

2023

6.4

2011

6.4

2018

6.5

6.6

2020

6.4

1972

6.6

6.6