7.8

2004

6.0

2012

7.8

2009

6.2

2010

7.5

2020

6.7

2023

6.5

2014

5.6

2013

5.7

2007

6.4

2013

7.6

2018

7.0

2005

5.4

2009

7.6

2010

6.0

2018

8.2

1984

9.2

2015

5.8

2021

5.4