[randomdata]

Suggesting that incomes should start to normalize as the kids with down syndrome start graduating form community college more and more? That's quite reasonable, if what you say is true.

Last time I saw the numbers only ~40% of Americans had reached some kind of post-secondary achievement, so even semi-recently it has still be fairly abnormal to graduate from college, including community college.

Incomes are stagnant, so as more and a wider set of the population attain such scholastic achievement in community college the averages on this level will mathematically have to show a decline, which will narrow the gap spoken of before relative to today's high school.