1985

5.1

2001

5.0

1994

7.3

2006

0.0

1986

6.1

1997

0.0

1989

6.6

2001

3.4

1989

7.5

1990

6.7

1991

6.6

1993

6.9

1990

6.0

2002

6.5

1998

7.2