Aggregate number (summed over 15 Gyr) of nova ejecta per unit star forming material as a function of metallicity, broken down by WD mass bracket. The data is tabulated in Table 3. In contrast with Fig. 8, which shows the event distribution, low-mass WD contributions dominate the ejecta mass profiles at all metallicities, although an increase in intermediate-mass WD contributions also be seen at low metallicities.