54% (1962)

53% (1960)

59% (1977)

57% (2000)

80% (1974)

100% (1987)

42% (2000)

42% (1984)

28% (2008)

15% (2005)

0% (1956)

0% (1979)

50% (1981)

40% (2015)

64% (1929)