54% (1954)

60% (1977)

54% (1970)

0% (1973)

0% (1975)

70% (1986)

0% (1973)

40% (1981)

50% (1971)

0% (1989)

45% (1966)

0% (1987)

37% (1959)

50% (1980)

10% (1981)

0% (1981)

59% (1966)

67% (1973)

0% (1990)

0% (1985)