53% (1993)

54% (1996)

55% (1993)

54% (1992)

41% (1998)

60% (1992)

61% (1992)

65% (1995)

57% (2000)

55% (1995)

66% (1998)

57% (1991)

53% (1995)

66% (1997)

52% (1994)

61% (1991)

59% (1995)

62% (1995)

58% (1994)

59% (1993)