1974

6.3

2012

5.7

2015

6.4

2006

6.3

1999

7.1

2023

7.0

1975

4.5

2012

9.7

2024

10.0

1997

6.3

2022

6.2

2017

7.1

2016

6.7

2014

7.7

6.1

2021

6.1

2023

6.2