1991

10.0

1989

7.2

1987

0.0

2012

4.7

1986

7.3

1988

5.9

1990

8.2

1986

7.0

2003

4.6

1986

0.0

1989

8.0

1985

5.8

1984

1.0

1986

6.6

1979

0.0

1984

3.0

1984

7.8