Spencer County, Indiana
Demographics
Table:
Historical population

Census	Pop.	Note	%±

1820	1,882	—
1830	3,196	69.8%
1840	6,305	97.3%
1850	8,616	36.7%
1860	14,556	68.9%
1870	17,998	23.6%
1880	22,122	22.9%
1890	22,060	−0.3%
1900	22,407	1.6%
1910	20,676	−7.7%
1920	18,400	−11.0%
1930	16,713	−9.2%
1940	16,211	−3.0%
1950	16,174	−0.2%
1960	16,074	−0.6%
1970	17,134	6.6%
1980	19,361	13.0%
1990	19,490	0.7%
2000	20,391	4.6%
2010	20,952	2.8%
2016 (est.)	20,648	[13]	−1.5%
U.S. Decennial Census[14]
1790-1960[15] 1900-1990[16]
1990-2000[17] 2010-2013[1]

Looking at the following table concerning the 'Demographics' part of 'Spencer County, Indiana', write a one-sentence description of the highlighted cells and return it as JSON: {"answer": "YOUR ANSWER"}.