1970

7.5

2019

8.1

2012

7.8

2019

7.8

2018

6.8

2007

7.8

2021

7.8

2016

7.6

2020

7.3

1999

8.2

2014

7.9

2023

7.7

2004

7.4

2017

7.6

2014

8.5

2011

7.3

2011

6.9

2021

7.4

2008

7.7

2000

8.2