Itawamba County, Mississippi
Demographics
Table:
Historical population

Census	Pop.	Note	%±

1840	5,375	—
1850	13,528	151.7%
1860	17,695	30.8%
1870	7,812	−55.9%
1880	10,663	36.5%
1890	11,708	9.8%
1900	13,544	15.7%
1910	14,526	7.3%
1920	15,647	7.7%
1930	18,225	16.5%
1940	19,922	9.3%
1950	17,216	−13.6%
1960	15,080	−12.4%
1970	16,847	11.7%
1980	20,518	21.8%
1990	20,017	−2.4%
2000	22,770	13.8%
2010	23,401	2.8%
2017 (est.)	23,508	[4]	0.5%
U.S. Decennial Census[5]
1790-1960[6] 1900-1990[7]
1990-2000[8] 2010-2013[1] 2017[9]

From the tabular data covering the 'Demographics' part of 'Itawamba County, Mississippi', draft a brief sentence that explains what the highlighted cells show and provide it inside the JSON object {"answer": "YOUR ANSWER"}.