57% (1994)

47% (1993)

52% (1994)

52% (1997)

33% (1995)

60% (1991)

68% (1997)

55% (1994)

45% (1995)

58% (1994)

49% (1994)

48% (1996)

54% (1994)

48% (1999)

66% (1997)

59% (1992)

45% (1998)

60% (1993)

50% (2000)

50% (2000)