1993

6.9

2006

5.2

1999

3.8

1993

5.8

2002

5.6

1998

3.3

1994

7.6

1981

2.8

1989

4.5

2005

6.8

1995

7.9

1998

5.2

2001

4.6

2003

8.2

2007

3.5

1994

8.8

1998

3.6

2001

3.5

2001

4.7

2002

6.8

2003

4.8

1999

6.1

1987

0.0

1988

6.3

1997

4.6

2001

5.6