10% (1973)

46% (1987)

60% (1984)

41% (1990)

57% (1987)

60% (1965)

64% (1970)

100% (1985)

0% (1981)

90% (1991)

53% (1965)

56% (1992)

46% (1990)

59% (1975)

60% (1991)

85% (1973)

40% (1985)

70% (1986)

68% (1990)

72% (1984)