40% (1998)

62% (2001)

61% (1998)

61% (1995)

54% (2000)

63% (2001)

52% (1999)

62% (1998)

59% (2001)

68% (1996)

48% (1995)

73% (1999)

37% (1994)

44% (1992)

46% (1995)

37% (1997)

46% (1999)

50% (1989)

61% (1998)

61% (2000)