55% (1984)

48% (1977)

64% (1975)

61% (1975)

64% (1977)

47% (1992)

61% (1975)

38% (1990)

61% (1975)

50% (1989)

44% (1989)

44% (1984)

10% (1973)

44% (1986)

23% (1973)

72% (2001)

60% (1998)

10% (1971)

35% (1996)

32% (1998)