The answer was that computers allowed new models that weren't measured by the stats. Just as much labor was done but now you'd have a few people running the numbers on a financial deal when before it was slower and more shoot-from-the-hip.
Consider the robots at Amazon warehouses: they are reducing the labor component, but amazon is growing so much that their hiring is growing as well, though not as rapidly as it would have without the robots...or do the robots mean they can open more sites? Who knows?
Plus the robots are leading to more workplace injuries but nobody is tracking that statistical correlation yet; the reportage is just starting to appear.
The numbers will be visible once it's obvious to everyone that a phase change has occurred.