44% (1984)

64% (1975)

38% (1990)

61% (1975)

45% (1989)

48% (1977)

47% (1992)

64% (1977)

53% (1991)

50% (1989)

32% (1998)

53% (1984)

73% (2001)

35% (1996)

61% (1975)

0% (1971)

10% (1973)

61% (1998)

10% (1970)

61% (1975)