62% (1998)

62% (2001)

54% (2000)

52% (1999)

61% (1995)

59% (2001)

62% (1998)

37% (1997)

68% (1996)

44% (1992)

40% (1998)

73% (1999)

60% (1998)

42% (1995)

48% (1995)

46% (1999)

68% (2000)

50% (1989)

63% (2001)

37% (1994)