62% (2001)

63% (1998)

61% (1998)

68% (1996)

53% (2000)

52% (1999)

59% (2001)

61% (1995)

63% (2001)

38% (1994)

49% (1995)

40% (1997)

73% (1999)

49% (1989)

43% (1998)

44% (1992)

62% (2000)

45% (1995)

68% (2000)

50% (1999)