1993

6.5

2020

7.5

2015

7.5

2011

7.3

2011

7.3

2004

9.5

1995

7.3

2012

7.0

2008

7.8

2018

8.4

2016

7.1

2006

8.1

2018

8.1

2017

8.0

1980

8.2

2008

7.5

2007

7.0

2016

7.0

2014

8.3

2020

7.4