A visual representation of the OP calculation done for the individual years of X-ray observations (given in the upper left of each panel) and the H₂CO observations divided into the same velocity ranges shown in Figure 2 (given in the upper right of each panel). The blue-filled shapes are the X-ray contours at a level of 3 × 10⁻⁹ counts s⁻¹ cm⁻² pixel⁻¹ shown as the outer contours in previous figures, and they trace even the diffuse X-ray emission from the cloud. The pink-filled shapes are the 3σ H₂CO contours. The purple regions show where the two sets of contours overlap. The OPs with X-ray being the primary data set are shown in blue in the lower left of each panel, and the percentages with H₂CO being the primary data set are shown in pink in the lower right of each panel.