Campbell County, Tennessee
Demographics
Table:
Historical population

Census	Pop.	Note	%±

1810	2,668	—
1820	4,244	59.1%
1830	5,110	20.4%
1840	6,149	20.3%
1850	6,068	−1.3%
1860	6,712	10.6%
1870	7,445	10.9%
1880	10,005	34.4%
1890	13,486	34.8%
1900	17,317	28.4%
1910	27,387	58.2%
1920	28,265	3.2%
1930	26,827	−5.1%
1940	31,131	16.0%
1950	34,369	10.4%
1960	27,936	−18.7%
1970	26,045	−6.8%
1980	34,923	34.1%
1990	35,079	0.4%
2000	39,854	13.6%
2010	40,716	2.2%
2016 (est.)	39,714	[9]	−2.5%
U.S. Decennial Census[10]
1790-1960[11] 1900-1990[12]
1990-2000[13] 2010-2014[2]

From the following table concerning 'Campbell County, Tennessee' titled 'Demographics', write a one-sentence description of the highlighted cells and format it within the following JSON object {"answer": "YOUR ANSWER"}.