1978

6.3

2001

6.5

1992

6.2

1980

0.0

1988

5.2

2000

8.0

1998

5.4

1990

6.9

1994

6.3

1989

4.5

1993

7.7

1998

5.3

1992

6.7

1992

7.7

1994

6.0

1996

7.8

1989

8.3

2002

5.9

1985

6.1

1995

6.5

1985

7.6

0.0

1995

6.0

1988

8.3

1990

6.0