It's true.
Some sources falsely claim that White indentured Servants were counted as ordinary Whites. But as the census form clearly states "FREE INHABITANTS" and certainly indentured Servants were NOT Free! Unfortunately we have no way of knowing just how many White Slaves there was. The United States government has sanitized all available material by falsely breaking it down using Negro and Colored.
Some have speculated that the reason the the American government won't acknowledge it's White Slaves, is because they fear that it would cause the White people to lose faith in their government. Sorry, the evidence is there, and we will show it - besides, what's one more lie in a society built on lies?