Census
China

One of the world's earliest preserved censuses was held in China in AD 2 during the Han dynasty, and is still considered by scholars to be quite accurate. The population was registered as having 57,671,400 individuals in 12,366,470 households but on this occasion only taxable families had been taken into account, indicating the income and the number of soldiers who could be mobilized. Another census was held in AD 144.
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