1977

4.6

1976

4.1

1984

5.7

1969

4.0

1967

0.0

1958

6.7

1983

0.0

1962

7.0

1957

0.0

1975

5.9

1992

0.0

1973

0.0

1975

5.2

1987

0.0

1974

7.3