64% (1965)

63% (1966)

60% (1981)

47% (1995)

57% (1979)

58% (1975)

61% (1967)

60% (1967)

47% (2003)

55% (1970)

65% (1962)

60% (1970)

53% (1967)

60% (1967)

48% (1972)

68% (1962)

50% (1966)

40% (1977)

45% (1970)

56% (1964)