2021

9.2

2019

7.0

2011

7.3

2006

6.1

2016

7.2

2014

6.3

2018

7.2

2014

7.1

2019

6.8

2015

6.5

2009

5.9

2012

6.1

2018

6.0

1989

6.2

2013

6.5

2006

6.8

2020

6.5

2017

5.7

2012

5.4

2019

6.5