64% (1977)

64% (1975)

36% (1990)

60% (1975)

47% (1977)

61% (1975)

45% (1984)

38% (1973)

50% (1984)

50% (1989)

47% (1992)

61% (1975)

32% (1998)

40% (1970)

73% (2001)

61% (1998)

44% (1989)

53% (1991)

0% (1971)

43% (1986)