1967

6.6

1999

7.0

2011

7.3

2014

5.6

2014

5.6

2005

6.5

2022

3.8

2008

5.9

2009

5.7

2013

7.1

2015

5.5

7.8

2020

7.2

2013

6.4

2003

6.0

2010

8.0

2012

5.3

2024

7.3

2017

6.4