5.4

2011

5.6

2017

5.9

2012

6.3

2007

5.7

1968

6.9

2020

9.4

2012

7.2

2023

6.8

6.3

1982

5.9

2022

6.1

1975

6.9

2017

9.5

1988

6.8

2019

6.0

2019

6.8

1998

6.6

2008

3.9

2014

5.9