1977

7.0

1999

6.7

1996

9.6

2017

6.0

2020

6.9

6.1

2021

9.2

2021

6.1

2024

9.9

2023

9.2

2012

5.5

2010

9.1

1997

6.8

2021

5.7

2020

9.8

2019

7.6

1964

5.7