62% (1988)

48% (1997)

66% (1980)

57% (1986)

61% (1987)

40% (1980)

42% (1992)

34% (1986)

56% (1978)

40% (1976)

0% (1987)

63% (1980)

95% (1979)

35% (1982)

55% (1979)

53% (1987)

70% (1994)

20% (1977)

30% (1986)

45% (1986)