48% (1997)

64% (1997)

53% (1993)

56% (1996)

62% (1995)

43% (1999)

54% (1998)

38% (1998)

59% (1995)

51% (1993)

57% (1995)

50% (1993)

44% (1996)

74% (1992)

53% (1991)

55% (1992)

44% (1992)

57% (1995)

47% (1997)

40% (1993)