71% (2007)

69% (2009)

78% (1964)

67% (1997)

61% (2004)

61% (2010)

70% (1987)

0% (1964)

75% (1992)

0% (1965)

70% (1989)

46% (2009)

0% (1966)

64% (2003)

70% (1986)

0% (1980)

74% (1986)

0% (1985)

40% (1968)

80% (1994)