-------------+-------------+---------------------------+---------------
Free | Slaves | No. of free to 1 slave | Total
-------------+-------------+---------------------------+---------------
23,264 | 17,088 | 1.35 | 40,352
-------------+-------------+---------------------------+---------------
In 1820.
-------------+-------------+---------------------------+---------------
42,634 | 32,814 | 1.29 | 75,488
-------------+-------------+---------------------------+---------------
In 1830.
-------------+-------------+---------------------------+---------------
70,962 | 65,659 | 1.08 | 136,621
-------------+-------------+---------------------------+---------------