69% (2002)

67% (1973)

65% (1961)

70% (1995)

63% (1983)

70% (2005)

71% (2011)

60% (1994)

0% (1979)

70% (1977)

55% (1969)

60% (1999)

50% (1998)

66% (1999)

0% (1986)

0% (1969)

78% (2002)

80% (1978)

0% (1978)

76% (2013)