According to USDA food intake data, Iron intake is the highest it has been in the past 100 years. In fact, it's almost 50% higher than it was in the 60's.
Considering this extra iron is largely from "Fortification" of bread and grains (including most processed food) and supplements, it's very likely we are eating more iron than at any point in human history.
People even vaguely interested in health or in health food/lifestyle spheres aren't eating fortified foods usually though. I'm sure just as many are low in iron but are scared of replenishing due to the fearmongering nature in which iron is presented - - it's very much necessary for health. If you haven't been eating caloric abundance including fortified wheat for a long time it's entirely possible your iron is either absolutely fine or even deficient.