Why did Nepal population decrease in the second and third censuses ? long answer please​

president thomas jefferson commissioned the expedition shortly after the louisiana purchase in 1803 to explore and to map the newly acquired territory, to find a practical route across the western half of the continent, and to establish an american presence in this territory before britain and other european powers

true is the answer to this

this act gave the federal government the power to relocate any native in the east to territory west of the mississippi river.