68% (1994)

69% (1990)

68% (1993)

63% (1990)

66% (1994)

45% (1990)

72% (1993)

58% (1993)

70% (1990)

70% (1992)

47% (1993)

44% (1992)

50% (1979)

47% (1991)

57% (1994)

52% (1993)

51% (1980)

53% (1980)

60% (1993)

58% (1993)