69% (1974)

59% (1979)

65% (1981)

61% (1981)

61% (1977)

59% (1976)

51% (1990)

61% (1978)

41% (1964)

53% (1982)

58% (1974)

58% (1980)

72% (1981)

30% (1982)

56% (1982)

40% (1921)

57% (1977)

46% (1984)

40% (1992)

60% (1981)