Washington County, Maryland
Demographics
Table:
Historical population

Census	Pop.	Note	%±

1790	15,822	—
1800	18,650	17.9%
1810	18,730	0.4%
1820	23,075	23.2%
1830	25,268	9.5%
1840	28,850	14.2%
1850	30,848	6.9%
1860	31,417	1.8%
1870	34,712	10.5%
1880	38,561	11.1%
1890	39,782	3.2%
1900	45,133	13.5%
1910	49,617	9.9%
1920	59,694	20.3%
1930	65,882	10.4%
1940	68,838	4.5%
1950	78,886	14.6%
1960	91,219	15.6%
1970	103,829	13.8%
1980	113,086	8.9%
1990	121,393	7.3%
2000	131,923	8.7%
2010	147,430	11.8%
2017 (est.)	150,578	[7]	2.1%
U.S. Decennial Census[8]
1790-1960[9] 1900-1990[10]
1990-2000[11]

Examining the data table for 'Washington County, Maryland', section 'Demographics', draft a brief sentence that explains what the highlighted cells show and format it within the following JSON object {"answer": "YOUR ANSWER"}.