That depends on just what disability we're talking about, but the total for the US is nearly 20% of the population[1]. Which seems like a sizable potential mark

That depends on just what disability we're talking about, but the total for the US is nearly 20% of the population[1]. Which seems like a sizable potential market... 1: https://www.census.gov/newsroom/releases/archives/miscellaneous/cb12-134.html https://www.census.gov/newsroom/releases/archives/miscellane...