46% (1990)

50% (1996)

62% (1998)

33% (1992)

40% (1995)

44% (1994)

56% (1991)

44% (1993)

40% (1991)

0% (1991)

45% (1995)

47% (1997)

10% (1997)

57% (1998)

24% (1991)

50% (1990)

63% (1998)

53% (1991)

51% (1993)

50% (1993)