Firewall Rules - Challenge Solved Rate

I have a firewall rule that challenges the visitor with a captcha. Through the dashboard I can see the Challenge Solved Rate (CSR). Right now it’s at 0% with 180 issued and 0 solved. How can I find the Challenge Solved Rate using the API?

I don’t see it mentioned anywhere in the API v4 docs or on the GraphQL Analytics API. Even if I pull all the firewall event logs, it’ll only show if the challenge was issued, not if they solved it.