1968

6.9

2006

7.1

2014

6.2

2017

7.3

2013

7.6

2011

6.1

2022

7.6

2021

7.7

2007

4.8

2003

7.2

2011

7.5

2010

6.3

2015

6.2

2020

6.2

2012

7.8

2021

6.8

2011

6.8

1998

8.4

2021

6.7

1995

7.9