61% (1999)

55% (1991)

41% (1996)

45% (1996)

50% (1995)

57% (1994)

51% (1995)

38% (1993)

46% (1998)

41% (1992)

47% (1993)

30% (1998)

39% (2000)

45% (1993)

46% (1997)

35% (1995)

52% (1994)

52% (1996)

42% (1995)

42% (1992)