59% (1977)

57% (2000)

54% (1962)

64% (1929)

36% (1984)

42% (2000)

37% (2008)

53% (1960)

50% (1981)

80% (1974)

15% (2005)

40% (2015)

100% (1987)

0% (1979)

0% (1956)