On slide 5, there are two time series shown. I'd like to underscore that these are just two of the different ones that could be prepared. The top one was the one I referred to, which was the 88ยข on the dollar. That compares hourly wages for full-time workers.
The lower one is maybe more reflective of the one you described, wherein more factors are associated related to the intensity of work, as well as the pay. The level is much lower and perhaps doesn't show the same amount of increase since the mid-1990s.