1998

6.2

1992

7.5

2007

6.7

2000

0.0

1990

5.5

1997

5.0

2007

6.0

2001

5.4

1996

5.2

1991

6.4

1987

6.0

1991

5.5

1996

6.6

2002

8.3

1997

5.3