1993

0.0

1997

6.3

1975

7.5

1995

0.0

1995

5.4

1985

7.5

1989

8.2

1984

8.0

1969

6.8

1958

6.7

1974

7.4

1985

6.7

1972

8.6

1959

0.0

1973

6.9

1999

7.0

2002

8.4

1960

5.0

1994

6.3

1997

0.0