Consumer revolving credit: https://fred.stlouisfed.org/series/CCLACBW027SBOG
Consumer delinquencies: https://fred.stlouisfed.org/series/DRCCLACBS
Both are ~on trend for post-GFC US, total debt isn't inflation adjusted either so of course the number is getting bigger as unemployment is low and inflation has been high. A more useful metric is probably household debt service ratios like: