Significantly more than you currently have. If you look on the Boards breakdown, you can see that almost all boards have several thousand posts (with the exception of Korea). This is significantly more activity than the Ukraine seems to have.

In addition, AFAIK it helps if you have a trusted user who fully understands the rules and how to enforce them (E.G with a significant amount of reports) to moderate the section. I am doubtful that either aiwe or yourself fit that quota.