Surčin
Demographics
Table:
Historical population
Year	Pop.	±% p.a.
1948	15,650	—
1953	16,107	+0.58%
1961	21,099	+3.43%
1971	28,081	+2.90%
1981	33,704	+1.84%
1991	35,636	+0.56%
2002	38,814	+0.78%
2011	43,819	+1.36%
Source: [8]

From the table information on 'Surčin' in the 'Demographics' section, draft a brief sentence that explains what the highlighted cells show and format it within the following JSON object {"answer": "YOUR ANSWER"}.