<prompt> Translate the following text to SwahiliInterest spending is determined by interest rates-which are held constant over the long-term-and the level of federal debt held by the public, which depends on the path of budget deficitssurpluses within each simulation.  <response>: Matumizi ya riba huamuliwa na viwango vya riba - ambavyo huhifadhiwa mara kwa mara kwa muda mrefu - na kiwango cha deni la shirikisho lililohifadhiwa na umma, ambalo hutegemea njia ya upungufu wa bajeti au ziada ndani ya kila simulation. 