78% (1977)

77% (1975)

75% (1978)

69% (1986)

85% (1978)

69% (1975)

57% (1973)

59% (1975)

0% (1985)

0% (1974)

0% (1974)

10% (1983)

40% (1973)

0% (1989)

0% (1975)

80% (1979)

70% (1974)

0% (1978)

0% (1973)

0% (1976)