1997

8.6

1990

8.0

1986

7.4

1997

4.0

1982

9.0

1997

9.3

1986

9.2

1987

8.3

1971

6.3

1989

10.0

1999

8.7

2001

5.9

1994

8.0

1998

6.7

1997

0.0

1992

9.5

1991

8.5

2024

6.0

2009

5.6