2020

6.4

2021

6.7

2023

6.8

2018

6.3

6.6

2011

6.6

2015

6.6

2011

6.4

1985

6.1

1996

6.5

1975

7.0

2023

6.4

2024

6.0

2024

6.8

1985

6.8

1972

6.6

2022

5.2

6.6

2015

6.4

1972

6.3