1981

8.3

2019

7.1

2022

6.0

2012

4.0

2005

7.0

2013

8.3

2006

9.3

2013

7.2

6.0

1991

7.6

2002

8.2

2010

8.2

2000

7.0

2019

9.0

2025

8.0

2003

7.4

1988

5.0

2024

9.1