The following indicators were produced by the 1998 control census, covering the rural part of the area under surveillance.
The population size was 30,886 individuals. These are distributed according to the following main age group structure: 18.3 % 0-4 years, 29.9% 5-15 years; 47.7 % 15-64 years and 4.1 % for 65+ years. 50.1% of the population are women.
The annual growth rate is 1.5% with a fertility rate of 6.6. Compared to the 1996 national census most of the indicators present a similar picture with no significant difference. The mean household size is 8 individuals and the dependency ratio is 109.8.
Migration is dominated by internal movements and to some extent by the external movement from the center of the country to the riverbanks in this zone.
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