Wahpeton, Iowa
Demographics
Table:
Historical populations
Year	Pop.	±%
1940	73	—
1950	127	+74.0%
1960	117	−7.9%
1970	149	+27.4%
1980	372	+149.7%
1990	484	+30.1%
2000	462	−4.5%
2010	341	−26.2%
2016	353	+3.5%
Source:"American FactFinder". United States Census Bureau. and Iowa Data Center
Source: U.S. Decennial Census[6]

Having looked at the tabular data covering 'Wahpeton, Iowa' — "Demographics" section, write a one-sentence description of the highlighted cells and provide it inside the JSON object {"answer": "YOUR ANSWER"}.