80% (1972)

60% (1975)

50% (1986)

53% (1996)

53% (1992)

50% (1988)

61% (1992)

86% (1967)

0% (1987)

0% (1980)

70% (1994)

100% (1995)

0% (1977)

59% (1978)

60% (1962)

90% (1987)

55% (1977)

0% (1981)

0% (1991)

0% (1978)