1992

6.8

1998

7.1

2006

7.7

2021

8.5

2022

8.0

1976

7.9

2020

8.1

1995

7.2

1985

7.9

2020

7.2

2021

7.2

2009

8.0

2007

7.9

1988

8.2

2012

7.7

2021

7.8

2023

7.4

2013

8.4

2024

6.4

2022

7.6