1996

5.8

2003

3.3

1996

6.0

2001

7.4

2000

7.6

1985

5.3

1994

7.8

1997

6.7

2000

8.5

2002

7.9

1985

6.4

1990

5.5

1995

6.5

2007

5.9

1999

5.2

1991

8.0

2002

7.3