<prompt> Translate the following text to SwahiliTo avoid the substantial volatility in the implied interest rate after 2005 as a result of declining debt, interest rates are held constant at 5.4 percent-the average interest rate assumed by CBO on short- and long-term Treasury securities-from 2005 through the end of the simulation period.  <response>: Ili kuepuka kutofautiana kwa kiwango cha riba baada ya mwaka 2005 kutokana na kupungua kwa madeni, viwango vya riba vimehifadhiwa kwa kiwango cha 5.4 - kiwango cha riba cha wastani cha CBO kwa dhamana za hazina za muda mfupi na mrefu - kuanzia mwaka 2005 hadi mwisho wa kipindi cha simulation. 