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T2=second tercile, T3=third terciles; *Kilometers of roadway per 100 km2 of land area; †Number of people per km2 of land area; ‡Proportion (%) of total land surface area; §Households without radio possession; ¶Mean years of education of head of household.
| Parameter | Parameter value |
|---|---|
| x1 | Rainfall T2 |
| x2 | Rainfall T3 |
| x3 | Roadway T2* |
| x4 | Roadway T3 |
| x5 | Population T2† |
| x6 | Population T3 |
| x7 | Urban T2‡ |
| x8 | Urban T3 |
| x9 | Radio T2§ |
| x10 | Radio T3 |
| x11 | Education T2¶ |
| x12 | Education T3 |
