1990

3.7

1993

8.0

1985

3.8

2007

0.0

1989

2.5

2012

0.0

2004

7.9

1981

6.5

1994

7.8

2006

6.9

1993

5.5

1997

3.9

1988

2.8

1995

7.3

1989

3.0

1996

7.0

1981

6.7

2001

0.0

2008

5.5

1997

3.8

1994

5.5

1991

5.9

1991

0.0

1993

7.0