72% (1989)

59% (1976)

41% (1978)

50% (1978)

39% (1977)

46% (1983)

48% (1980)

45% (1983)

50% (1973)

63% (1969)

50% (1973)

62% (1970)

0% (1997)

50% (1975)

42% (1975)

42% (1980)

50% (1962)

42% (1972)

54% (1972)

50% (1973)