One very rough method of estimating the possible Yoruba imports in Saint-Domingue is to combine estimates and data from Manning, Geggus, and other sources. Manning, whose study of the slave trade in Dahomey was a major source used by us for another group, has provided us some rough estimates for the ethnic origin of Slave Coast exports in the period from 1641-1870. Using his estimates for the period 1641-1800, we calculated that about 10.35% of the total exports were of Yoruba captives. If one applies this estimate of 10.35% to David Geggus's data on Bight of Benin imports in Saint-Domingue, one reaches the figure of around 16327 "Nago" captives. Intriguingly, Geggus's own dataset of 13,334 slaves from 1721-1797 included 1580 Nago captives. That makes them about 11.85% of the slave population in that particular dataset. But applying that percentage to the total estimated slave imports would wield an unreasonably high number, about 71,077.
When checking the Slave Voyages site on the Trans-Atlantic Slave Trade, one finds different numbers. For the period from 1709-1792, the data gives us a total of 185,248 captives brought to Saint Domingue from the Bight of Benin. If one uses Manning's data for a general estimate of 10.35%, then perhaps 19173 Yoruba were brought to the colony of Saint Domingue in the 18th century. This is higher than our earlier estimate of 16327 but still plausible. It also seems likely that in the later decades of the 18th century, the Nago presence among the African-born population was proportionally greater or more conspicuous. Nonetheless, it is likely that the numbers of Nago captives brought to the colony were perhaps anywhere from 16327 to 19173. Using the latter high, one might suggest the "Nago" were nearly 3.2% of the total imported into the island on French ships. The number was likely higher since smuggled captives were not considered and the data isn't as reliable as it should be.