Notes. The first columns give values for the full sample of 1920 objects, the second only for objects with secure EW₀ measurements (objects with a UV continuum counterpart) and the last columns for the objects that only have limiting EW₀ (without UV continuum counterparts). The first line gives the flux ratio between the blue bump (f_bb) and the total flux (f_t including both the red main peak and the blue bump). The second line contains the peak separation in km s⁻¹, the third line the FWHM, also in km s⁻¹, the fourth line gives the asymmetry parameter a_asym. of the red, main peak, and the last line the rest-frame EW₀ in Å. The values above the middle division are given for the sub-sample of objects with an EW₀ below 240 Å, while the lower values are for the sub-sample with higher EW₀.