Yes, you're absolutely right. In our case, we were effectively doing one massive annual dump of this data into an online tool (vs. multiple releases of k-anonym

Yes, you're absolutely right. In our case, we were effectively doing one massive annual dump of this data into an online tool (vs. multiple releases of k-anonymous data), so we didn't have to worry about the more complicated cases of two separate data releases causing disclosures. (That, and the regulations that governed our program said to suppress cells based on 3 or less individuals... so, that's what we had to do.)