Rosemont, Maryland
Demographics
Table:
Historical population

Census	Pop.	Note	%±

1960	212	—
1970	250	17.9%
1980	223	−10.8%
1990	256	14.8%
2000	273	6.6%
2010	294	7.7%
2017 (est.)	312	[4]	6.1%
U.S. Decennial Census[7]

Consulting the table information on 'Rosemont, Maryland' (see 'Demographics'), draft a brief sentence that explains what the highlighted cells show and return it as JSON: {"answer": "YOUR ANSWER"}.