Batad, Iloilo
Demographics
Table:
Population census of Batad
Year	Pop.	±% p.a.
1903	2,133	—
1960	7,712	+2.28%
1970	9,372	+1.97%
1975	9,819	+0.94%
1980	11,790	+3.73%
1990	14,337	+1.98%
1995	15,345	+1.28%
2000	17,009	+2.23%
2007	18,298	+1.01%
2010	19,385	+2.12%
2015	21,298	+1.81%
Source: Philippine Statistics Authority[5][6][7][8]

Based on the table that covers 'Batad, Iloilo' in the 'Demographics' section, formulate a single-sentence overview of the highlighted cells and format it within the following JSON object {"answer": "YOUR ANSWER"}.