I’ve tended to use a combination of 7 and 8 myself. I use the Veiled Alliance book numbers and run with them being adult, non-slave city dwellers only. Anyone who lives outside the walls (most nobles, non-tradesmen and the like) aren’t counted and slaves don’t count at all. Typically 10 people outside the walls, and an average of 1 slaves per 3 free persons if you want that figure.
Sorry, I suck at tables:
| City | Urban Pop | Urban Slaves | Rural Pop | Rural Slaves | Total Pop |
| Tyr | 12,000 | 0 | 160,000 | 0 | 172,000 |
| Balic | 27,000 | 9,000 | 270,000 | 90,000| 396,000 |
| Draj | 15,000 |5,000 | 150,000 |50,000 |220,000 |
| Gulg | 8,500 | 2,833 | 85,000 | 28,333 | 124,667 |
| Nibenay | 24,000 | 8,000 | 240,000 | 80,000 | 352,000 |
| Raam | 40,000 | 13,333 | 400,000 | 133,333 | 586,667 |
| Urik | 32,000 | 10,667 |320,000 |106,667 |469,333 |
Tyr’s figures are off, many were killed during Kalak’s attempt to become a dragon and the various riots after his death. All slaves were converted to freemen but at least 4,000 are dead. This could easily be higher if you so desired but it’s still the second smallest city state so I left it as is.
In my games, the levy was always every year from every city. Plenty of slaves to fill out the levy and more could be gotten from the various tribes in the wastes.
For further reference, the lowest population growth in the middle ages is listed in wiki as 9% per year. For fun, if you take just the slave numbers you end up with the following:
Even at a 3% population growth rate among the slaves, every city state (except Gulg) would have at least a small surplus of home grown slaves after the 1,000 slave per year levy.