Tioga, Pennsylvania
Demographics
Table:
Historical population

Census	Pop.	Note	%±

1860	450	—
1870	440	−2.2%
1880	520	18.2%
1890	557	7.1%
1900	524	−5.9%
1910	533	1.7%
1920	368	−31.0%
1930	431	17.1%
1940	460	6.7%
1950	544	18.3%
1960	597	9.7%
1970	624	4.5%
1980	613	−1.8%
1990	638	4.1%
2000	622	−2.5%
2010	666	7.1%
2016 (est.)	658	[2]	−1.2%
Sources:[5][6][7]

With reference to the tabular data covering 'Tioga, Pennsylvania' titled 'Demographics', draft a brief sentence that explains what the highlighted cells show and return it as JSON: {"answer": "YOUR ANSWER"}.