2004

5.6

1987

7.3

1999

6.8

1998

6.6

1993

5.5

1993

5.0

1997

1.0

2006

5.4

2004

4.8

1982

4.3

1998

7.2

2001

6.1

1988

4.9

1995

6.6

2002

7.2

1999

7.4

2003

5.8

1994

7.0

2005

6.7

2006

6.0