66% (1980)

62% (1988)

57% (1986)

61% (1987)

34% (1986)

56% (1978)

63% (1980)

48% (1997)

53% (1987)

30% (1986)

45% (1986)

35% (1982)

40% (1980)

70% (1994)

42% (1992)

0% (1987)

0% (1978)

0% (1981)

40% (1976)

95% (1979)