2017

6.0

1993

6.1

2008

7.5

1968

6.9

2015

5.8

1978

7.0

1982

5.8

2019

6.3

2014

6.6

2020

6.4

2021

7.7

2015

6.8

1972

6.6

2011

6.4

2011

6.8

2006

6.4

2015

6.6

2018

4.7

2016

6.1