1999

0.0

2000

6.0

1959

0.0

2004

8.5

2005

6.7

1976

6.8

2001

6.9

1994

10.0

1965

7.8

2006

5.3

1994

8.4

1985

7.5

2001

6.4

2006

8.5

1964

8.0

2004

6.6

2001

6.5

1964

7.4

1971

7.9

1988

5.8