5.4

2017

5.9

2003

6.7

2007

5.7

2011

5.7

2010

7.5

2012

6.4

1990

7.0

1996

6.5

2022

9.0

1970

6.6

2012

5.8

2020

5.2

1997

7.6

2018

7.5

1977

7.7

2024

6.9

2023

7.1

1957

8.5