44% (1992)

50% (1986)

56% (1976)

59% (1974)

51% (1981)

55% (1979)

60% (1985)

50% (1990)

65% (1984)

50% (1977)

50% (1975)

57% (1982)

63% (1979)

50% (1974)

60% (1987)

56% (1977)

0% (1979)

60% (1984)

0% (1992)

64% (1977)