1993

9.0

2002

0.0

1991

6.0

1980

5.8

1975

4.9

1986

6.5

2009

9.0

2016

7.4

1982

6.7

1980

5.4

2005

3.5

1986

0.0

2009

8.0

1995

0.0

2000

7.0