51% (1987)

63% (1964)

65% (1968)

70% (2006)

59% (1975)

39% (1985)

48% (1991)

33% (1985)

57% (1966)

57% (1978)

45% (1992)

69% (1997)

63% (1979)

50% (1983)

65% (1984)

67% (1971)

61% (1990)

27% (1971)

64% (1988)

0% (1965)