1988

5.8

2010

7.0

2018

6.0

2016

6.7

2007

6.6

1984

6.5

1988

5.5

1990

4.4

2017

6.1

2023

6.8

2006

5.9

2013

6.4

1997

6.6

2023

5.6

2012

7.1

7.1

1995

5.6

2024

7.5

2023

4.7

2021

7.4