71% (2007)

69% (2009)

78% (1964)

61% (2010)

61% (2004)

67% (1997)

0% (1965)

74% (1986)

70% (1986)

65% (1985)

0% (1985)

67% (1989)

46% (2009)

60% (1983)

70% (1982)

62% (1987)

50% (1979)

80% (1958)

85% (1962)

0% (1979)