To this day, the official version is, nothing happened there and then. If you talk about it online inside china, or using chinese services outside of it, it will automatically be blocked.
So yes, people did get out, but till this day they will have to face persecution or other disadvantages and some want to to visit family again or not have them face consequences.
In other words I don't know about any numbers, but how can you claim to know, when the chinese government did all it could to prevent acurate information?
Also, china has many cities. If in the biggest incident there were up to 2000 dead, then it all could easily add up to ten thousands. (But like I said, I don't claim to know)