Histogram of the relative percent errors (﹩{\sigma }_{{R}_{p}}/{R}_{p}﹩) on derived planetary radii. Relative percent errors on planetary radius values for 263 planets were propagated from errors on the transit depth such that ﹩{\sigma }_{{R}_{p}}=\tfrac{{\sigma }_{\delta }}{\delta }﹩. For the 27 remaining planets in our sample, relative percent errors were calculated from ﹩{\sigma }_{{R}_{p}}=\tfrac{{\delta }_{{R}_{p}/{R}_{\star }}}{{R}_{p}/{R}_{\star }}﹩. Our relative errors on planetary radii do not factor in stellar uncertainties since our planetary sample is built from a uniform stellar sample.