61% (1999)

61% (1994)

43% (1996)

30% (1998)

35% (1995)

45% (1993)

42% (1995)

49% (1992)

44% (1992)

34% (1993)

46% (1998)

52% (1994)

45% (1996)

38% (2000)

42% (1999)

46% (1992)

44% (2000)

48% (1995)

51% (1992)

56% (1997)