Molecular gas fraction as a function of latitude or height (left panel) and as a function of angular separation or projected distance from the GC (right panel). Points denote the CO detections, color-coded as in Figure 6. Up-down triangles with arrows represents observed Hi clouds with no CO detections, for which we estimate molecular mass upper limits (see Section 3.4). The size of all markers is proportional to the peak Hi column density of the cloud, ranging from 5 × 10¹⁸ cm⁻² to 8 × 10¹⁹ cm⁻².