60% (1980)

40% (1996)

46% (1987)

55% (2004)

67% (1986)

61% (1980)

86% (1990)

49% (1975)

61% (1962)

55% (1980)

10% (1992)

0% (1980)

25% (1984)

56% (1990)

60% (1978)

57% (1979)

50% (1980)

0% (1984)

58% (1979)

0% (1992)