71% (1993)

60% (1966)

64% (1987)

62% (1976)

73% (1981)

40% (1979)

70% (1972)

63% (1977)

69% (1980)

30% (1986)

69% (1985)

67% (1978)

64% (1984)

61% (1974)

72% (1980)

0% (1976)

45% (1980)

55% (1960)

65% (1982)

0% (2006)