Retrieved transmission spectra for the population. Retrieved median spectra for each wavelength range, ﹩{\lambda }_{\min }﹩ = 0.3 μm, ﹩{\lambda }_{\min }﹩ = 0.6 μm, and ﹩{\lambda }_{\min }﹩ = 1.1 μm, are displayed in purple, blue, and orange, respectively. The light and dark shaded regions correspond to the 1σ and 2σ confidence regions. The data points show the observed spectrum, where the marker colors correspond to data above the minimum wavelength of the three retrievals, following the same color scheme as the retrieved spectra. Planets are displayed in order of their retrieved Rayleigh enhancement factor, ﹩\mathrm{log}a﹩, with the planet with the lowest value of ﹩\mathrm{log}a﹩ at the top of the figure. The y-axis scale is expressed in atmospheric scale heights, H = k _B T/μ g, where T is taken as the retrieved temperature from the ﹩{\lambda }_{\min }﹩ = 0.3 μm retrieval (+ an arbitrary offset for clarity).