48% (1992)

53% (1990)

64% (1973)

35% (1997)

47% (1993)

62% (1989)

90% (1981)

64% (1989)

70% (1997)

80% (1989)

0% (1994)

72% (1972)

62% (2002)

57% (1989)

0% (2005)

0% (1980)

0% (1963)

58% (1985)

70% (1983)

50% (1982)