Table 1.

Sociodemographic data of the three municipalities

Municipality	% Speaking indigenous language	% Speaking Zapotec monolingual	% Speaking Zapotec monolingual	% Of 15 year-old or older who read and write in Spanish	Average number of years in school	% Of the population engaged in primary production activities
	Year 2000	Year 2000	Year 1950	Year 2000	Year 2000	Year 2000
Juchitán de Zaragoza	70.01	8.81	27.26	52.11	6.26	13.89
San Blas Atempa	92.76	24.87	72.08	39.95	3.56	33.79
Santa María Xadani	97.71	34.07	83.33	32.05	3.36	35.01

Linguistic competencies, level of schooling and primary production as an occupation of the three municipalities. The gradient is shown in percentages of Zapotec and monolingual speakers, reading and writing skills in Spanish, formal education level and population engaged in primary productivity activities.