74% (1981)

31% (1988)

50% (1982)

57% (1966)

80% (1986)

47% (1965)

40% (1983)

50% (1962)

50% (1964)

50% (1982)

42% (1982)

50% (1955)

60% (1963)

46% (1971)

50% (1960)

50% (1990)

65% (1969)

52% (1969)

53% (1961)

50% (1980)