Families of Charged Persons and The Court

Are there statistics showing how often and/or how many family members of a person charged with a crime attend the various proceedings? Also what impact family attendance has on the court? I’m curious to know, but I’m having trouble figuring out the correct search terms to look. I keep ending up with search results about various issues with family law and family courts.

Who would keep track of such thing?

And why would anyone keep track?

I can see someone deciding to do a study. Not sure what keywords to use. You might have better luck at a college library database, rather than google.