To be more specific I'd bet the majority of these are public defenders. I'd bet people who can afford their own attorneys are far more likely to have charges dropped or go to court than the average case.
I wish I could remember which book I read it in, but in one counties lawyers joined together and refused all plea bargains. It almost instantly collapsed the legal system in their county and caused a multi year backlog. Our legal system is no longer setup to provide all people the right to a fair trial, we simply don’t provide the resources for it anymore.