69% (1991)

67% (1994)

68% (1993)

62% (1990)

47% (1991)

56% (1978)

57% (1994)

45% (1990)

64% (1980)

70% (1992)

72% (1993)

57% (1993)

0% (1991)

60% (1993)

44% (1992)

52% (1993)

0% (1980)

50% (1980)

43% (1994)

48% (1992)