2000

7.8

1997

9.0

1990

0.0

2005

5.4

2006

4.8

1975

10.0

2002

5.0

1991

7.2

1974

8.0

1983

8.9

2010

6.5

1984

6.9

1993

6.0

2007

8.2

2002

7.0

1988

0.0

1974

0.0

1973

0.0