1997

6.1

2001

5.6

1976

6.4

1997

8.2

2009

6.5

1981

5.6

1983

6.7

2000

6.3

1990

5.0

2002

6.8

2018

3.0

2025

0.0

1997

6.5

2011

5.4

2020

4.2

1991

6.9

2008

5.4

2022

8.0

2023

7.9

2008

7.2