61% (2012)

60% (1973)

62% (1975)

62% (1968)

66% (1976)

63% (1974)

60% (1973)

52% (1996)

63% (1977)

64% (1971)

21% (1979)

50% (1977)

67% (1975)

67% (1973)

40% (1981)

64% (2005)

64% (1969)

0% (1979)

37% (1973)

60% (1974)