54% (2013)

53% (1949)

71% (1958)

54% (1989)

61% (1999)

43% (2011)

61% (1998)

64% (1996)

71% (1965)

61% (1970)

54% (1996)

68% (1966)

64% (1992)

69% (2003)

56% (2004)

60% (1967)

72% (1964)

61% (1967)

52% (1989)

62% (1992)