In the 1830s and 1840s, the system accounted for more than three-quarters of U.S. federal employees.
Before 1900, there was no system to account for the federal employees.
mnli hypothesis: Before 1900, there was no system to account for the federal employees. premise: In the 1830s and 1840s, the system accounted for more than three-quarters of U.S. federal employees.