1971

3.8

2010

7.0

2019

10.0

2014

6.5

2022

7.8

2012

10.0

2003

7.6

1982

8.1

2014

7.0

2001

6.7

2004

3.7

2004

6.7

3.6

2009

5.9

2013

4.9

2013

7.5

2015

10.0