Members of the British military and their families, who were not included in the census, bring the actual population to about 17,000.
In September 2011, the mayor estimated the actual population at 20,000.
It is possible the actual population would have been around 10,000 to 25,000 people.
Some estimate their actual population to be anywhere from 600,000 to 1 million.
The actual population was unknown as of the 2000 census.
But most actual populations are not so simple or tidy.
Historians have not estimated what their actual population was when Union forces arrived.
Some community leaders believed that the actual population was closer to 70,000.
It was quite well done with the result we have a second and much better approximation of the actual population.
As such, all figures are likely to be lower than the actual population on the census date.