64% (1973)

47% (1993)

53% (1990)

48% (1992)

35% (1997)

64% (1989)

62% (1989)

72% (1972)

80% (1989)

62% (2002)

70% (1997)

58% (1985)

75% (1970)

0% (1980)

57% (1989)

67% (1977)

0% (1982)

50% (1982)

0% (1970)

0% (1981)