2008

5.2

2018

6.2

1985

6.1

6.6

2015

6.4

1984

7.2

2023

6.4

1977

5.3

2014

5.2

1975

7.0

2017

6.9

2020

6.4

2023

6.5

2017

6.9

2021

7.7

2006

7.1

2000

5.6

2022

5.5

1993

6.5

1991

4.8