How do you reconcile personal income going up 50% with family income going up only 30% and dual income families going up 30% over the same timespan? Are these really tracking the same thing?
Also, I don't understand what you mean about silencing detractors. What number are you saying it would be useful to have? The number of dual income families? That data is available from many sources, eg: https://taxfoundation.org/data/all/federal/america-has-becom...
I believe you may have seen some number somewhere, it would be useful to have that to silence detractors.