What is the highest p-value observed in any Augmented Dickey-Fuller test during the stationarity analysis?

What is the highest p-value observed in any Augmented Dickey-Fuller test during the stationarity analysis?: a task in SmolDataEnvs-harbor-train-sandbox: 📊 SmolDataEnvs: Harbor (train) (Harbor dataset). Files (in /home/user/input, no subfolders): - AirPassengers.csv