1990

0.0

1996

7.5

1992

8.5

1997

7.2

1965

6.4

1981

6.5

1968

6.0

1967

6.5

1985

7.8

1978

5.0

1963

5.3

1957

6.8

1960

6.7

1976

7.5

1960

6.0

2000

8.0

2002

6.9

1957

4.8

1969

4.0

1967

6.4

1971

0.0

1979

4.0

1996

0.0

1958

7.0

1980

0.0

1960

6.3