Line emission detection fractions for the different species observed within PACS range. Objects with (top) and without (bottom) an outflow. Each species has a different colour: [OI] (purple), [CII] (yellow), H₂O (blue), CO (green), and OH (red). The numbers on top of the bars refer to the total detections over the total targets observed. The atomic/molecular species and central wavelengths for the transitions are also indicated.