1985

6.1

2020

6.4

2023

6.5

2015

5.8

2024

7.3

2021

6.7

2017

5.7

1996

6.5

2018

6.3

2017

6.9

2021

7.2

6.6

2011

6.6

1993

6.1

1972

6.6

2023

6.4

1993

6.5

6.8

2025

5.0

2004

7.1