2008

6.5

2010

6.6

6.4

2017

7.7

2011

7.1

2012

6.3

2020

6.9

2015

7.4

2014

6.8

2017

6.6

2013

6.7

1962

7.9

1995

6.1

2016

7.2

2019

7.3

1964

6.9

2023

6.0

2004

7.2

2017

6.2

2018

7.3