66% (1964)

53% (2002)

42% (1985)

64% (1955)

68% (2004)

62% (1980)

75% (2011)

67% (1978)

62% (1965)

76% (2005)

85% (2013)

48% (2000)

79% (1963)

72% (2007)

70% (2004)

75% (1979)

62% (1953)

55% (1979)

58% (1999)

71% (1990)