60% (1978)

68% (1988)

0% (1973)

72% (1975)

55% (1976)

64% (1973)

60% (1980)

78% (1971)

45% (1986)

70% (1989)

62% (1990)

70% (1974)

40% (1969)

60% (1976)

60% (1975)

75% (1972)

55% (1992)

70% (1978)

63% (1989)

70% (1977)