50% (1961)

56% (1972)

55% (1959)

65% (1970)

52% (1971)

57% (1963)

52% (1970)

56% (1967)

48% (1957)

39% (2014)

50% (1959)

50% (1950)

50% (1961)

40% (1969)

60% (1968)

50% (1958)

50% (1958)

52% (1961)

50% (1958)

65% (2005)