1985

6.4

2006

5.9

2014

7.1

2017

6.0

1974

6.2

2010

6.4

1982

5.7

2020

4.7

2013

6.1

2019

5.4

2009

6.5

2023

5.8

2011

5.8

2021

6.0

2008

7.3

2011

3.1

2002

7.5

2022

7.1