Read this: Imported Chinese labourers arrived in 1810, reaching a peak of 618 in 1818, after which numbers were reduced. Only a few older men remained after the British Crown took over the government of the island from the East India Company in 1834. The majority were sent back to China, although records in the Cape suggest that they never got any farther than Cape Town. There were also a very few Indian lascars who worked under the harbour master.
Now answer this question, if there is an answer (If it cannot be answered, return "unanswerable"): How many imported Chinese laborers were there at the peak of importation?
618