61% (2012)

63% (1975)

65% (1976)

63% (1974)

65% (1971)

51% (1996)

60% (1973)

62% (1968)

63% (1977)

50% (1977)

65% (1974)

60% (1974)

40% (1981)

60% (1973)

67% (1975)

21% (1979)

62% (2005)

67% (1973)

37% (1973)

0% (1979)