2016

6.7

2012

6.4

2009

6.2

5.4

2021

6.2

2007

5.7

2011

5.7

2017

7.9

1993

5.8

1980

5.9

2017

5.9

2023

9.1

2014

4.8

2020

7.1

1966

6.1

1987

6.3

2008

5.2

5.6

2011

9.5