78% (1991)

80% (1984)

73% (1996)

56% (1992)

72% (1996)

68% (2001)

76% (2004)

70% (1987)

100% (1994)

63% (1996)

80% (1996)

92% (1989)

75% (1989)

80% (2011)

40% (1993)