68% (1993)

72% (1987)

67% (1986)

62% (1990)

74% (1991)

76% (1986)

59% (1999)

60% (1975)

70% (1999)

53% (1988)

72% (1996)

50% (1992)

50% (1988)

90% (1974)

43% (1976)

0% (1991)

64% (2001)

68% (1973)

48% (1974)

65% (1986)