1985

5.9

2009

7.5

2017

7.4

2007

7.7

2015

7.9

2006

6.4

2006

6.4

2014

7.6

2018

7.2

1988

6.2

2010

5.5

2013

6.6

1982

7.3

2016

6.5

2022

6.3

2008

6.3

2013

6.1

2010

7.9

2023

7.4

2011

4.2