74% (1985)

75% (1981)

52% (1987)

57% (1978)

50% (1981)

63% (1979)

64% (1973)

42% (1990)

44% (1988)

0% (1987)

58% (1963)

63% (1992)

57% (1982)

45% (1982)

60% (1967)

0% (1990)

52% (1986)

48% (1986)

57% (1980)

35% (1983)