How many percent? "And there have also been reports of tinnitus following COVID itself." --- Again, how many percent? Where is the study / research on this?

How many percent? "And there have also been reports of tinnitus following COVID itself." --- Again, how many percent? Where is the study / research on this? Even something that looks like they went through a rigorous process. VAERS isn't valid, yet they're bringing it up as something authoritative. Anybody and their mother can make a unsubstantiated report on there. Ugh