On a different note or maybe not-- Yoshie, there is absolutely no correlation between percent of population engaged in agriculture and food self-sufficiency. On the contrary, the correlation is usually negative. The lower the percentage of population required for food production, the higher the gross output.
Simple, really-- substitution of machinery, technique for labor. Productivity in agriculture being a result of overall productivity. Venezuela's agricultural situation is not due to too few people engaged in food production, but due to the social legacy of export production under a hacienda system of chocolate; of a more capitalist based export production of coffee; of the coincident archaic agricultural relations maintained by capitalism, unable to support even the subsistence of rural workers, not to mention the needs of the urban populations AND the development of advanced capitalist conditions in the cities and the oil industry-- where the substitution of equipment, "capital" for labor has impoverished the large migrations that took place during and after WW 2.
