<prompt> Translate the following text to SwahiliFor example, interest income on state and local government bonds, which are used primarily for infrastructure purposes, are exempt from federal taxes.  <response>: Kwa mfano, mapato ya riba juu ya dhamana ya serikali ya serikali na serikali za mitaa, ambayo hutumiwa hasa kwa madhumuni ya miundombinu, ni huru kutoka kwa kodi za shirikisho. 