In states where there was disenfranchisement the maximum percentage was 10-20% of otherwise eligible white voters with most states having considerably smaller percentages.
An unknown proportion of citizens were also subject to disenfranchisement (atimia), excluding some of them permanently and others temporarily (depending on the type).
The psychology of disenfranchisement theory suggests that there are three components that drive the psychology of disenfranchisement: alienation, cynicism and perceived victimization.