1992

6.8

2007

6.8

2016

6.4

2004

4.5

2013

7.7

1997

7.8

2021

8.3

2006

6.7

1961

9.0

1983

7.7

2023

5.0

2014

7.9

2020

3.5

1990

8.7

2020

7.8

1969

10.0

2024

5.7

10.0