In a direct answer to your question, no. Dialing is usually automated and it will route a call to an "operator" only if it's successful and you answer the call. The ratio of calls to actual scammers could probably be 100:1 or even 1000:1. We simply don't know what call volume different scammer call centers are capable of.
Also, the scammers could be targeting a specific age group or geolocation for one reason or another. This may cause daily or weekly fluctuations in call volumes. Scam call centers may run multiple scams resulting in several calls from the same place, but just from different phone numbers.
It may be possible to collect call back numbers for one or two places and you could call back multiple times and attempt to take a rough survey of how many different people might answer. In many cases, scammers work using a hand-off system where the first operator will bait the person before handing them off to a "manager" to complete the scam. From this, you could get a rough idea of the worker hierarchy at a particular place which may help identify how many people are working.
Even with that local information, you probably couldn't get a global picture.