1967

6.4

1998

5.9

1994

6.8

1975

4.5

2015

6.4

2006

9.8

2023

6.2

5.0

1968

6.9

2018

6.5

2025

6.9

2020

7.8

2021

6.2

2004

7.1

2020

7.2

2012

5.7

1990

6.4

2004

9.9

1972

10.0