1992

5.5

1990

6.0

1997

9.7

1993

7.8

2004

8.1

2000

6.4

1984

7.1

1995

5.6

1996

6.3

1989

6.8

2007

6.0

2002

0.0

2001

6.2

1993

5.6

1999

5.3