2006

8.5

2016

6.8

2012

7.7

1976

7.4

2011

8.4

2015

8.7

2021

8.4

2013

7.6

2019

7.3

2016

7.3

2008

6.7

2018

7.0

2015

7.8

2013

7.9

2004

8.6

1970

6.2

2007

8.1

2009

7.3

2022

5.8

1984

7.8