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. 2005 Aug 11;5:83. doi: 10.1186/1471-2458-5-83

Table 1.

Studied population in the years 1994, 1998 and 2002, by gender and age group

Years of the survey Gender Age group Total

Boys Girls 11-year-olds 13-year-olds 15-year-olds
1994 N 2 429 2 999 1 783 1 886 1 759 5 428
% 44.8 55.2 32.9 34,7 32,4 100.0

1998 N 2 150 2 363 1 566 1 512 1 435 4 513
% 47.6 52.4 34.7 33.5 31.8 100.0

2002 N 2 887 2 758 1 867 1 873 1 905 5 645
% 51.1 48.9 33.1 33.2 33.7 100.0

Total N 7 466 8 120 5 216 5 271 5 099 15 586
% 47.9 52.1 33.5 33.8 32.7 100.0