68% (1996)

61% (1998)

52% (1999)

62% (1998)

40% (1998)

61% (1995)

59% (2001)

37% (1997)

46% (1999)

60% (1998)

61% (2000)

61% (2001)

63% (2001)

44% (1992)

42% (1995)

37% (1994)

68% (2000)

73% (1999)

35% (1998)

53% (2000)