<prompt> Translate the following text to SwahiliWith the combination of higher prices and improved efficiency, total expenditures for electricity consumption in 2015 are projected to increase by about 17 to 39, depending on the scenario.  <response>: Kwa mchanganyiko wa bei ya juu na ufanisi ulioimarishwa, gharama za jumla za matumizi ya umeme katika 2015 zinatarajiwa kuongezeka kwa karibu 17 hadi 39, kulingana na hali. 