US History: Chapter 2, Exercise 2 — Possible Solution
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QUALIFICATION
The article says between one-half and two-thirds of European immigrants
between the 1630s and the Revolution came under indentures, and separately
about 48 percent of roughly 500,000 to 550,000 arrivals before 1775. Servants
served four or five years without wages.

UNCERTAIN
The two estimates do not match and the article does not explain why. The
Caribbean mortality figure (33 to 50 percent) is not a mainland figure.