Left: Total number of sources in the SDSS DR16 data that satisfies the imposed color criteria of R − I < 0.7 (blue) and number of sources in our VIMOS survey (black) per magnitude bin. Right: Ratio between the total number of sources in the SDSS DR16 data and our VIMOS survey per magnitude bin. The dashed black line mark the mean of this fraction, for the 17.5 < r < 22.5 interval. On average, we have recovered ∼27% of the sources present on the field with our target selection.