2015

6.5

2017

8.6

2016

4.2

5.0

2019

7.5

2011

7.2

2011

7.5

2020

7.2

1974

6.5

2021

6.2

2012

6.5

2015

6.4

2014

5.8

1982

5.7

2007

7.4

1995

6.3

2008

7.3

2000

6.1

2013

5.4

2009

6.7