1991

0.0

1976

7.1

1972

10.0

2002

5.8

2003

5.7

1964

5.5

1977

10.0

1972

0.0

2001

6.0

2004

5.9

1978

5.3

1981

6.8

1998

6.4

1997

5.0

1967

5.8