Calculate demand of Electric Energy.

Assume the demand in the United States is increasing at a rate of 5% annually. For how long can the United States be self-sustained with respect to electric energy without constructing new generating plants? Use the link provided for reference.

 Respond with a paragraph  or two and  equations that support your answer, not just a number. 

https://www.eia.gov/energyexplained/index.php?page=electricity_home#tab2