My accounting went out the window last year - bad hard drive, not training, doing a lot of short runs, and general laziness, so I don't have hard numbers to hand. Rough math I did 75 cpm to the hub and about 120k, worked an average of 5 day weeks. Total gross was $89k, but that's misleading as I "sold back" my vacation because there was no place to go, $85,000 is a more realistic number - only 3 students the whole year, and those were in December.
The other caveat I'll mention is I understand my pay structure and the system - I know which loads pay better and how to structure my day so I'm more likely to get those loads. Over this last year I have been flabbergasted by how many tenured drivers don't understand the pay structure, let alone how to manipulate it to their advantage.
I'm also disturbed by how many drivers don't know how to say the words "you realize I'm not asking, right?" or "when I ask you to do something it's a polite way of telling you".
All that said, I will concede that your safety department is probably less inundated with pointless bs.