1997

5.3

1986

6.5

1989

6.5

1988

7.0

1987

7.6

2001

6.8

1995

7.4

1996

0.0

1984

7.5

1993

7.1

1996

8.3

1987

6.3

1999

6.5

1998

7.1

1989

5.7