Counting working slaves how many slaves in America today?

Considering that slaves used to have all food housing and other basic needs met. How many today are really no more than working slaves?
Update: In the good ole days 150 + years ago slaves got free accommodation , free food and clothes. Minimum wage in the sixties in America was around $1.15, today it is around $7.50 - an increase of around 6.5 times. A medium house price would be only a few thousand dollars, today it is well over $100,000, an increase of... show more In the good ole days 150 + years ago slaves got free accommodation , free food and clothes. Minimum wage in the sixties in America was around $1.15, today it is around $7.50 - an increase of around 6.5 times. A medium house price would be only a few thousand dollars, today it is well over $100,000, an increase of over 20 times.
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