1986

4.4

1990

4.3

1995

0.0

1997

4.0

1989

6.5

1995

6.0

1996

6.2

1989

4.5

1989

6.6

2004

6.4

1994

5.5

2002

2.5

1988

6.1

2001

4.9

1987

5.4

1985

7.3

1992

3.0

1988

6.2