<prompt> Translate the following text to EnglishUokoaji wa kitaifa wa jumla ni kipimo kinachotumiwa kwa kawaida kupima kama uwezo wa taifa wa kuzalisha bidhaa na huduma katika siku zijazo unaongezeka au kupungua.  <response>: Net national saving is the measure commonly used to gauge whether the nations capacity to produce goods and services in the future is increasing or decreasing. 