In 1991, 1,453,245 livestock production units existed National Institute of Statistics and Geography [INEGI by its acronym in Spanish], 1991; by 2007, this number decreased to 1,131,272 INEGI, 2007.
En 1991 existían 1 453 245 unidades de producción ganadera Instituto Nacional de Estadística y Geografía [INEGI], 1991, mientras que para 2007 disminuyeron a 1 131 272 INEGI, 2007.