1980

5.9

1963

6.9

2012

5.7

1998

6.0

2018

6.7

1988

6.4

1994

6.6

1993

6.3

2021

6.1

1982

6.8

2019

6.5

1994

5.4

2020

6.7

1993

6.5

1995

4.6

2011

6.6

2004

6.5

2011

6.6

2023

6.1

2023

6.1