1980

7.9

2020

7.0

2007

6.7

2013

5.0

2023

8.0

2006

5.5

2007

6.9

1997

6.1

2006

5.4

2006

6.3

1995

7.3

1977

6.6

2002

6.9

2018

4.4

2025

0.0

1994

7.4

1991

6.5

2013

5.7

1995

6.4

2005

0.0