20% (1961)

58% (1980)

51% (1982)

68% (1962)

45% (1979)

71% (1987)

57% (1967)

43% (1983)

55% (1974)

0% (1982)

60% (1984)

50% (1980)

50% (1976)

58% (1978)

30% (1987)

65% (1982)

60% (1984)

50% (1967)

0% (1975)

55% (2011)