For commercial shows, that's private information. Even the people working on the show don't necessarily know any more than what's released as the weekly grosses. Only the lead producers and probably general managers know how a show is doing overall.
Nonprofits have to file tax forms called 990s, which are public information. If you read through those for a nonprofit like Roundabout, you MIGHT be able to figure out how each show had done, but it's complicated and they only have to disclose certain financial information.