As a start, the table below provides the estimated shelf life for common food items - this information was provided by the US Department of Agriculture.
Keep in mind, food longevity is highly variable. A cool, dry environment can have a much different affect on food than a hot, damp environment. Also, storage longevity will depend on the type of food being stored, its packaging and the storage method. Although the USDA's table below doesn't provide this information, some properly packaged and stored foods - like salt and honey - will last indefinitely.
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