1991

5.8

1986

6.0

1993

5.4

1996

0.0

1995

6.3

1987

7.8

1992

6.9

1994

0.0

1979

6.8

1991

0.0

1995

0.0

1995

4.0

1991

6.0

1984

6.6

1999

5.3

1994

5.9

2002

0.0

1989

5.4