1997

6.6

2004

3.6

2015

4.5

2000

7.6

2002

7.7

2005

4.0

1993

7.1

1994

7.8

2015

0.0

2018

4.2

2025

0.0

1996

7.0

1989

8.0

1991

4.0

2002

8.1