2000

7.2

1997

9.2

2005

4.7

2006

4.5

2002

0.0

1991

4.5

1974

0.0

1983

8.5

2010

6.5

1984

6.7

1993

0.0

2007

7.9

2002

7.0

1988

0.0

1973

0.0