70% (1972)

78% (1957)

78% (1979)

83% (1980)

72% (1976)

70% (1982)

0% (1975)

0% (1992)

77% (1983)

60% (1993)

69% (1978)

60% (1967)

76% (1987)

0% (1972)

0% (1983)

0% (1980)

74% (1988)

80% (1970)

10% (1984)

0% (1984)