The Load Statistics tab on the Evaluation (EV) transaction will tell you how many vendors have responded to your Solicitation, how many responses have been loaded and how many responses still need to be loaded to the EV transaction.
If the Solicitation Vendor List Response Required parameter on Application Parameter is set to Yes, Evaluation transactions cannot be submitted to Final until all vendors on the Vendor List tab have submitted a Solicitation Response transaction. The Solicitation Response Automation Generation (SRAG) page allows you to quickly generate the Solicitation Response transactions.