56% (1993)

74% (1992)

59% (1995)

56% (1994)

49% (2000)

49% (1995)

47% (1997)

55% (1998)

53% (1995)

64% (1997)

57% (1995)

53% (1991)

53% (1993)

53% (1998)

59% (1994)

54% (1992)

47% (1997)

55% (1996)

45% (1997)

53% (1999)