50% (1982)

55% (1979)

60% (1984)

61% (1969)

61% (1983)

55% (1975)

54% (1975)

66% (1971)

35% (1979)

90% (1984)

61% (1976)

0% (1985)

60% (1981)

64% (1978)

57% (1978)

67% (1979)

0% (1969)

63% (1981)

57% (1985)

70% (1980)