55% (1970)

63% (1966)

57% (1979)

47% (1995)

58% (1975)

42% (1970)

60% (1980)

60% (1967)

60% (1981)

60% (1970)

67% (1966)

50% (1966)

64% (1965)

58% (1970)

70% (1968)

0% (1970)

58% (1964)

60% (1966)

55% (1965)

40% (1977)