1999

7.3

2004

0.0

1999

1.0

1981

4.0

2007

3.4

2001

5.5

2007

3.0

1976

7.0

2006

7.6

2000

0.0

2004

8.3

2006

0.0

0.0

2000

7.0

1981

6.0

2007

8.2

2002

2.7

1988

6.4

1987

6.3

1972

3.8