72% (1993)

73% (1991)

65% (1995)

73% (1990)

66% (1986)

73% (1989)

72% (1987)

72% (1989)

46% (1999)

65% (1995)

67% (1983)

59% (2002)

68% (1991)

59% (1996)

57% (1984)

58% (1993)

61% (2003)

62% (1993)

47% (1986)

50% (1985)