45% (1998)

54% (1994)

57% (1994)

49% (1994)

43% (1991)

59% (1999)

47% (1993)

55% (1994)

37% (2001)

55% (1994)

53% (1991)

38% (1997)

50% (1994)

60% (1991)

61% (1993)

48% (1996)

44% (1997)

48% (1998)

46% (1991)

67% (1995)