76% (1997)

65% (1978)

56% (1989)

52% (2003)

75% (2011)

78% (1978)

62% (1953)

75% (2013)

72% (2006)

76% (1996)

66% (1964)

68% (1985)

60% (1986)

79% (1963)

70% (1962)

69% (1982)

55% (1994)

61% (1980)

76% (2002)

76% (1993)