Could be 100x fewer, or 10,000x fewer. 5x fewer would mean that rich people and poor people resist DCs at the same rate, but that there are 5x fewer DCs in rich areas. But, my guess is that rich people would actually resist a lot more if someone dared to consider building a DC in their area... but that probably never happens, because why would a company buy up expensive real estate for a DC?

Size of each demographic used for the statistics is in the article, approx. N=220 for each of them.