70% (1974)

65% (1981)

59% (1979)

61% (1981)

62% (1978)

62% (1977)

60% (1976)

54% (1982)

72% (1981)

50% (1990)

58% (1974)

58% (1980)

69% (1982)

57% (1977)

57% (1983)

40% (1992)

42% (1964)

50% (1968)

30% (1982)

53% (1982)