Top panel: normalized counts (number of sources per bin divided by the total number of sources) vs. luminosity of the methanol masers, for both the Pandian et al. (2007, 2009) data (red dashed line) and our own results (including new and known masers) with the luminosity of both the methanol (black solid line) and OH masers (blue dash-dotted line). Bottom panel: normalized counts vs. luminosity of all methanol masers from both our survey and the AMGPS.