1985

7.5

2007

8.1

2020

7.4

2021

7.1

7.2

2019

6.9

2015

7.3

2003

7.7

2023

8.2

2021

7.9

2014

7.8

2015

7.8

2018

7.8

2004

6.8

2017

7.6

2019

7.6

2018

7.6

2013

7.6

2011

7.4

2009

7.2