1985

6.1

2018

6.3

2011

6.4

1971

7.7

2013

6.5

2020

6.3

2011

6.6

2020

5.5

2020

6.1

2022

6.9

2015

6.5

1955

7.4

2017

9.0

2015

6.4

2024

7.6

2021

7.2

2009

5.6

2012

6.8

2019

7.8

1993

6.1