1989

9.2

2008

6.2

2013

6.1

2020

9.4

1971

6.3

2015

5.8

2008

5.7

2016

6.7

2014

6.6

2017

6.0

2020

7.0

2016

6.1

2012

5.6

1980

5.9

2023

6.2

2014

8.5

2011

5.2

2003

8.8

1996

7.5

2010

5.2