74% (1981)

40% (1983)

50% (1982)

65% (1969)

42% (1982)

57% (1966)

31% (1988)

50% (1960)

46% (1971)

80% (1986)

47% (1965)

50% (1955)

50% (1982)

50% (1962)

50% (1990)

50% (1964)

60% (1963)

52% (1969)

55% (1970)

50% (1980)