1991

7.2

1988

4.7

1989

8.1

1985

5.5

1985

4.1

2001

4.6

1986

7.3

1982

7.7

1984

6.0

1984

6.0

1992

4.5

1988

0.0

1987

0.0

2002

7.0

1989

6.2