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Notes
1. National Center for Education Statistic. Table 322.10, Bachelor’s degrees conferred by postsecondary institutions, by field of study: Selected years, 1970–71 through 2017–18. (https://nces.ed.gov/programs/digest/d19/tables/dt19_322.10.asp)
2. Eurostat: Distribution of tertiary education graduates by broad field of education, 2017 (https://ec.europa.eu/eurostat/statistics-explained/index.php/Tertiary_education_statistics#Graduates)