<prompt> Translate the following text to EnglishKiwango cha riba cha deni la kitaifa huhifadhiwa kuwa sawa, kwa mfano, hata wakati mapungufu yanapopanda na kiwango cha akiba ya kitaifa kinapungua.  <response>: The interest rate on the national debt is held constant, for example, even when deficits climb and the national saving rate plummets. 