1985

8.5

1990

6.4

1986

4.7

2007

6.0

1981

8.2

1993

0.0

1993

0.0

2002

0.0

2002

0.0

1981

6.9

1989

7.2

2009

4.6

1987

5.2

1990

3.0

1981

0.0