1993

6.9

1998

7.1

2006

5.2

1999

4.3

1986

6.5

1993

7.0

2002

5.6

1998

3.2

1994

7.6

1981

2.7

1989

4.5

2005

6.8

1995

7.9

1998

5.3

2004

5.3

2001

4.6

2003

8.2

2007

3.5

1994

8.2

1998

3.6

2001

3.5

2001

4.7

2002

7.1

2003

4.8

1999

6.1

1987

0.0

1988

6.2

1997

4.6

2000

10.0

2001

5.6