64% (1981)

50% (2001)

35% (1987)

67% (1954)

54% (2011)

63% (1984)

70% (1977)

60% (1958)

50% (2002)

59% (1979)

64% (1962)

64% (2012)

60% (2014)

48% (1957)

52% (1986)

52% (1968)

53% (1975)

50% (1952)

39% (1980)

50% (2010)