My bad, so who was a slave, just the nieces and nephews of the last slaves brought in 1808?
Actually, yes. After 1808, the expansion of the slave population was due to the fecundity of the slaves themselves. That's not to say that there wasn't probably some smuggling going on, but between the British vigilance on the high seas, and the trouble getting a shipful of hundreds of human beings past customs and unloaded without the "wrong" people noticing, I doubt it made a significant contribution.