Yeah. I mean the ratio is likely much different than when I tended bar in the Pleistocene era, but back then credit cards were the only thing you'd report. Cash was right into the pocket.
This is still true but having bartended for the last decade till a year ago it has shifted to probably 85% cc tips. Even the last "dive bar" I worked at was at least 70% cc tips, with other industry people making up most of the cash tips