55% (1984)

64% (1977)

64% (1975)

47% (1992)

44% (1989)

60% (1975)

47% (1977)

50% (1989)

44% (1986)

38% (1990)

0% (1975)

61% (1975)

23% (1973)

35% (1996)

53% (1991)

61% (1975)

44% (1984)

40% (1970)

72% (2001)

32% (1998)