68% (1952)

55% (1994)

60% (1992)

58% (2005)

61% (1970)

64% (1971)

70% (1998)

76% (2015)

69% (1956)

70% (1992)

60% (1986)

90% (1948)

62% (1998)

69% (1984)

30% (1999)

60% (1995)

60% (1957)

84% (1971)

35% (1966)

73% (2015)