77% (1995)

72% (1988)

72% (1990)

75% (1995)

63% (2003)

66% (1986)

70% (1999)

73% (1996)

70% (1987)

79% (1985)

68% (1999)

68% (1990)

64% (1986)

73% (1987)

80% (1994)

62% (1994)

55% (1989)

85% (1999)

60% (1981)

56% (1984)