Blackwell, Oklahoma
Demographics
Table:
Historical population

Census	Pop.	Note	%±

1900	2,283	—
1910	3,266	43.1%
1920	7,174	119.7%
1930	9,521	32.7%
1940	8,537	−10.3%
1950	9,199	7.8%
1960	9,588	4.2%
1970	8,645	−9.8%
1980	8,400	−2.8%
1990	7,538	−10.3%
2000	7,668	1.7%
2010	7,092	−7.5%
2015 (est.)	6,875	[27]	−3.1%
U.S. Decennial Census

Based on the table information on 'Blackwell, Oklahoma' in the 'Demographics' section, write a one-sentence description of the highlighted cells and provide it inside the JSON object {"answer": "YOUR ANSWER"}.