Table 1.

Socio-demographic characteristics of the informants.

Population	Gender		Age	School level
	Male	Female		Illiterate	Elementary	Secondary	Undergraduate	Graduate
Blida	11	13	[21–75]	2	4	5	6	7
Chlef	9	11	[24–67]	3	3	8	4	2
Djelfa	10	19	[20–77]	10	9	4	4	2
El Bayadh	12	17	[23–81]	11	5	1	6	6
Mascara	9	16	[25–70]	3	8	5	4	5
Oran	12	18	[21–65]	2	6	5	4	13
Relizane	10	14	[27–67]	2	6	6	4	6
Saida	11	12	[25–71]	3	8	6	3	3
Sidi Belabbes	9	13	[20–65]	2	6	4	6	4
Tiaret	32	41	[18–84]	11	16	19	18	9
Tissemsilt	18	22	[20–82]	13	11	4	6	6
Tlemcen	11	14	[23–64]	5	7	3	4	6
Total	154	210	[18–84]	67	89	70	69	69