1991

8.3

2003

7.1

2025

8.5

2020

5.7

2001

6.5

2003

5.5

2002

5.2

2007

6.1

2005

6.1

2019

7.4

2016

4.2

0.0

2002

6.1

2009

5.6

2001

6.4

2024

0.0

2021

0.0

1986

6.7

2013

6.5

1982

6.4