 Educational attainment varied greatly depending on occupational field with 68% of those in the professional and professional support fields having a bachelor's degree or higher, compared to only 31.6% of those employed in sales and 11.6% of those in the service sector.Considering the fact that the average American does not have a bachelor's degree, he or she is most likely employed in the service, sales, and office support fields with many working in the professional support and business fields as well.All together the American economy and labor force have changed greatly since the middle of the 20th.