Total carbon, nitrogen, and oxygen abundances for each star, broken down in the separate components. In each bar the uncertainties of the carbon (left), nitrogen (middle), and oxygen abundances are shown. Stars from Martins et al. (2024) that overlap with our sample are shown in the hatched bars. The horizontal dashed line shows the total baseline abundance from Dopita et al. (2019), which is also broken down in the separate components on the right.