59% (1995)

75% (1992)

56% (1993)

46% (1997)

66% (1994)

53% (1991)

56% (1994)

49% (2000)

53% (1992)

48% (1996)

43% (1995)

62% (1995)

44% (1992)

64% (1997)

49% (1995)

43% (1996)

55% (1995)

52% (1993)

46% (1997)

50% (1993)