A summary of the CO and N₂ reported in various comets with respect to parent molecule (top) and with respect to water (bottom). The CO/CO₂ ratios are reported by O. H. Pinto et al. (2022) and references within. N₂ abundances with respect to water are directly reported for three of these comets (N. Iro et al. 2003; L. Le Roy et al. 2015; A. J. McKay et al. 2019), and we calculated the N₂ abundances for C/2001 Q4 and C/1961 R1 from the N₂/CO and CO/H₂O ratios compiled by S. Anderson et al. (2023). For Comet 67P, we use the N₂ abundance reported by M. Rubin et al. (2019), and the CO, CO₂, and NH₃ values reported by M. Läuter et al. (2020). For clarity, we exclude the results from Comet C/2016 R2, which report CO and N₂ abundances relative to water of (30,800% ± 3500%) and (1550% ± 370%), respectively (A. J. McKay et al. 2019). Comet 67P markers are star shaped for emphasis. Shaded orange and blue regions represent the CO and N₂ abundances reported following photolysis and radiolysis, respectively. Downward-pointing arrows indicate upper limits on reported hypervolatile abundances.