1993

6.5

1990

6.2

1995

6.0

1995

6.4

1982

7.6

1992

0.0

1998

6.0

1992

6.7

1987

7.7

1984

7.4

1994

0.0

1993

6.7

1994

7.8

2000

7.0

1997

10.0

2009

7.7