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. 2017 Apr 5;12(4):e0172104. doi: 10.1371/journal.pone.0172104

Table 1. Unweighted survey population percentages (N = 2016) and estimated percentage national population data.

Great Britain United States
% Survey
Population *1 (N = 991)
% National population *2 % Survey
Population *1 (N = 1025)
% National population *3
Gender
Female 55 51 57 52
Male 45 49 43 48
Age
15/181−24 18 15 12 12
25–34 14 17 14 9
35–44 13 16 16 17
45–54 14 17 23 18
55–64 15 14 21 17
65+ 27 21 16 18
Education
Degree or higher 27 24 41 29
Ethnicity (GB) / Race (US)4
“White” 86 88 81 77
All other groups 14 12 19 23

Notes

* Percentages may not sum to total due to rounding.

1. Great Britain sample includes adults 15 years and over. USA sample includes adults 18 years and over.

2. National Readership Survey Data 2014.

3. US Census 2013 and American Community Survey 2013.

4. The term ‘ethnicity’ was used in Great Britain and ‘race’ in the United States. Ethnic/racial groups were self-defined by respondents using pre-defined categories.