With an area of 151,563 square kilometres (58,519 sq mi), it is the nation's third-largest state. It comprises 38 municipalities (municipios). In 2010, Coahuila's population is 2,748,391 inhabitants. The five largest cities in Coahuila are the state capital city of Saltillo; the second largest is TorreÃ³n, third largest is Monclova (a former state capital), fourth largest is Ciudad AcuÃ±a, and fifth largest is Piedras Negras
From what I have read it varies with the quality of the paint and the storage conditions,but 3-5 years is reasonable for unopened cans. Most of the evidence seems anecdotal. There always seems to be a case of someone using something 20 years old that they got for free and it lasted 30 years.
The length of time that your exterior paint job will last depends on the region where you live. In most climates, the paint should last five to seven years. The wood trim on the house or siding is a different story. It will start to fade and show its age within 3 years. This is due to the sun exposure.