1991

8.1

2005

6.3

6.3

5.6

6.7

2017

6.1

2020

7.0

6.6

2012

5.4

2022

7.7

2010

7.5

6.5

2013

6.8

2017

5.7

2010

5.5

2023

6.8

1992

4.8

2015

7.6

2013

6.0

2014

6.5