This is another question which, thanks to the lack of transparency provided by the Pi Network, there is no firm answer to. If, at present, every active user mines 0.4 PI an hour, and there are 29 million active users on the network, this would mean that there were 278.4 million PI mined every day. This figure, however, could easily be far too low, or far too high. Unless the network makes its statistics available, there is no certain answer.