62% (1988)

57% (1986)

61% (1987)

66% (1980)

56% (1978)

48% (1997)

34% (1986)

53% (1987)

63% (1980)

45% (1986)

0% (1987)

95% (1979)

40% (1980)

35% (1982)

42% (1992)

40% (1976)

20% (1977)

70% (1994)

0% (1981)

55% (1979)