78% (1991)

68% (2001)

80% (1984)

73% (1996)

72% (1996)

56% (1992)

77% (2004)

80% (1996)

70% (1987)

100% (1994)

92% (1989)

80% (2011)

40% (1993)

63% (1996)

75% (1989)