49% (1973)

0% (1979)

76% (1977)

53% (1974)

40% (1979)

71% (1990)

60% (1968)

0% (1970)

0% (1986)

30% (1979)

60% (1970)

0% (1989)

62% (1973)

57% (1974)

0% (1967)

86% (1980)

73% (1992)

0% (1975)

10% (1989)

10% (1988)