2007

8.5

2015

8.2

2016

6.4

2017

8.0

2022

5.5

2014

8.2

1986

5.5

2017

7.9

1991

6.0

2020

7.0

2023

6.9

2013

5.5

2012

5.7

2021

8.0

2014

7.8

2003

9.2

1968

4.7