72% (2007)

86% (2010)

60% (1986)

79% (1963)

72% (2001)

57% (1999)

70% (1962)

61% (1980)

76% (2002)

45% (1982)

75% (2002)

52% (1992)

75% (2012)

47% (2000)

95% (1968)

79% (2008)

60% (1961)

59% (1991)

71% (1990)

74% (2004)