2023

6.0

2012

6.1

2015

7.6

2009

7.3

2013

7.9

2014

7.6

2013

5.4

2011

7.5

2010

8.2

2009

5.6

2008

8.0

2016

7.9

2015

7.7

2016

6.5

2012

7.1

1974

7.5

2017

6.7

1993

6.9

2007

8.1

1999

7.6