The title of the image says "who owns America's debt" (the total amount of bonds we've sold), but the caption, and the dollar amount, suggest that it's actually

The title of the image says "who owns America's debt" (the total amount of bonds we've sold), but the caption, and the dollar amount, suggest that it's actually about the deficit (the total amount - in a given year - by which government expenditures exceed the amount of money taxed from citizens).