1983

7.0

2017

6.9

2013

6.3

1975

6.3

2022

6.7

1969

6.6

2005

5.7

2024

5.7

2005

6.9

1986

6.2

2010

6.5

2021

6.1

1994

5.8

2020

6.7

1999

6.8

2017

6.5

2013

7.1

1980

5.9

2011

6.7