67% (1991)

55% (1991)

61% (1994)

46% (1998)

47% (1995)

67% (1993)

37% (1990)

58% (1991)

60% (1990)

25% (1995)

20% (1995)

35% (1994)

47% (1993)

49% (1990)

35% (1996)

49% (1992)

51% (1993)

40% (1995)

51% (1991)

62% (1996)