2006

5.0

1985

6.2

1980

6.8

1981

4.9

1998

6.4

2000

5.8

1993

5.7

2005

0.0

1979

5.8

1980

4.0

1984

6.1

2011

8.1

1996

6.0

1988

4.0

1989

4.0

1985

3.8

1999

5.8

1987

0.0