59% (2001)

59% (1998)

72% (1998)

63% (1998)

73% (1999)

69% (1989)

60% (1997)

69% (1985)

55% (1999)

70% (1978)

64% (1998)

39% (2002)

69% (2000)

57% (1987)

74% (1980)

65% (1986)

0% (1988)