1982

5.8

1975

4.5

2006

7.8

5.0

2011

9.7

2009

7.9

2012

7.7

2015

6.0

2021

6.2

2016

7.7

2020

6.0

2000

6.7

2021

7.7

2013

8.1

1971

6.1

2015

6.4

2010

6.8

2009

7.5

2023

10.0

2016

7.1