56% (1972)

10% (1981)

68% (1989)

40% (1984)

58% (1991)

0% (1976)

0% (1965)

58% (1975)

76% (1977)

0% (1986)

70% (1965)

0% (1970)

60% (1972)

0% (1968)

0% (1963)

54% (1977)

0% (1967)

56% (1974)

0% (1976)

50% (1984)