72% (1985)

70% (1984)

61% (1990)

62% (1992)

67% (1992)

57% (1991)

53% (1990)

65% (1988)

60% (1985)

53% (1985)

56% (1991)

64% (1986)

63% (1991)

37% (1995)

10% (1994)

56% (1988)

0% (1990)

20% (1985)

61% (1993)

25% (1985)