2020

7.5

1968

8.1

1994

8.5

2019

8.5

2019

7.8

2019

8.1

2018

7.4

2017

7.3

2022

7.2

2021

7.8

2018

7.3

2016

8.2

2015

7.6

2017

7.6

2020

7.4

2023

7.0

2016

7.9

1989

8.3

2018

8.0

2016

7.9