DuPont reported depreciation expense of $1,319 million on its consolidated financial state...

DuPont reported depreciation expense of $1,319 million on its consolidated financial statements for the period ended December 31, 2012. The following excerpt is taken from the company’s consolidated balance sheet for the same year:

Analyze:

If the company continued to record depreciation expense at this level each year, how many years remain until all assets would be fully depreciated? (Assume no salvage values.)