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

8.1

2002

2.7

1988

6.5

1987

6.3

1972

3.8

1982

7.2

2001

6.5

2006

7.7

1996

7.3

2006

0.0

0.0