1972

6.3

2014

7.1

2007

5.7

2011

5.3

2017

6.1

2023

6.8

2012

6.3

2010

6.4

2012

6.4

2017

5.9

2018

6.5

2005

10.0

2002

4.7

2020

6.7

2015

5.9

2015

5.2

2010

7.7

2015

6.4

2003

6.0