63% (2001)

61% (1989)

44% (1988)

50% (1990)

65% (1998)

55% (1996)

64% (1985)

54% (1987)

57% (1988)

51% (1996)

54% (1994)

38% (2002)

61% (1988)

65% (1988)

62% (1984)

67% (1990)

52% (1985)

52% (1996)

53% (1998)

39% (1999)