61% (2001)

40% (1995)

52% (1993)

40% (2000)

66% (1997)

32% (1999)

59% (1991)

25% (1998)

56% (1997)

79% (1990)

40% (1993)

51% (1994)

53% (2001)

63% (1994)

57% (1998)

47% (1993)

59% (1997)

50% (1993)

43% (1999)

50% (2001)