It is also considered to be one of the best forms of energy commodities to deliver modern, economically viable, affordable, efficient and reliable energy services. Therefore, electricity occupies the highest position on the energy ladder and is regarded as the cleanest (to end-users) and most efficient of all fuels on the ladder (table 2.1) (Toole, 2015). It is also expected to play an even greater role in the future worldwide energy matrix as its use for transport services expands. It equals production of energy products plus imports minus exports minus international bunkers plus or minus stock changes.