1980

7.3

2008

5.7

2014

6.4

2019

6.4

1976

7.3

2015

6.2

1998

6.2

1965

6.8

2017

5.5

1964

7.0

2020

8.4

2018

7.3

2009

6.1

2022

6.8

2014

6.0

2012

7.8

2010

6.6

2016

7.0

1984

6.8

2006

7.8