Ketchum, Oklahoma
Demographics
Table:
Historical population

Census	Pop.	Note	%±

1940	611	—
1950	254	−58.4%
1960	255	0.4%
1970	238	−6.7%
1980	326	37.0%
1990	263	−19.3%
2000	286	8.7%
2010	442	54.5%
2015 (est.)	438	[9]	−0.9%
U.S. Decennial Census[10]

Taking into account the table information on 'Ketchum, Oklahoma', section 'Demographics', summarise the highlighted cells in a single sentence and return it as JSON: {"answer": "YOUR ANSWER"}.