65% (1981)

59% (1979)

70% (1974)

60% (1981)

62% (1977)

62% (1978)

72% (1981)

41% (1964)

58% (1974)

58% (1980)

51% (1990)

53% (1982)

40% (1921)

57% (1983)

59% (1976)

56% (1982)

30% (1982)

57% (1977)

40% (1992)

46% (1984)