60% (1951)

40% (1957)

46% (1955)

50% (1990)

50% (1956)

50% (1960)

50% (1949)

51% (1965)

52% (1969)

47% (1990)

40% (1956)

50% (1961)

60% (1951)

45% (1947)

70% (1958)

55% (1957)

45% (1959)

45% (1971)

50% (1974)

50% (1960)