49% (1957)

64% (1969)

54% (1955)

56% (1968)

50% (1969)

90% (1980)

40% (1977)

53% (1980)

54% (1968)

30% (1991)

57% (1979)

0% (1966)

63% (1977)

61% (1980)

0% (1989)

0% (1965)

67% (1964)

80% (1964)

0% (1991)

56% (1989)