1990

8.1

1999

7.3

2017

7.3

2016

7.0

2011

7.3

2005

7.0

2013

8.1

2009

6.9

1996

8.1

2020

7.8

1982

7.7

2023

6.6

2014

7.1

1997

4.3

2013

7.6

2022

8.8

2024

7.6

7.2

1996

7.0

1984

6.8