Index, Washington
Demographics
Table:
Historical population

Census	Pop.	Note	%±

1910	417	—
1920	412	−1.2%
1930	381	−7.5%
1940	217	−43.0%
1950	211	−2.8%
1960	158	−25.1%
1970	169	7.0%
1980	147	−13.0%
1990	139	−5.4%
2000	157	12.9%
2010	178	13.4%
2016 (est.)	199	[9]	11.8%
U.S. Decennial Census[10]
2015 Estimate[3]

Per the details in the tabular data covering 'Index, Washington' — "Demographics" section, create one factual sentence about the highlighted cells, without adding extra data and provide it inside the JSON object {"answer": "YOUR ANSWER"}.