What percentage of the time does the NO₂ concentration exceed 150 μg/m³ in the dataset?

What percentage of the time does the NO₂ concentration exceed 150 μg/m³ in the dataset?: a task in SmolDataEnvs-harbor-train-sandbox: 📊 SmolDataEnvs: Harbor (train) (Harbor dataset). Files (in /home/user/input, no subfolders): - AirQualityUCI.csv