<prompt> Translate the following text to SwahiliThe National Bureau of Economic Research estimates that stocks outpace Treasury securities by a range of 3 percent to 13 percent a year.  <response>: Kulingana na Shirika la Kitaifa la Utafiti wa Kiuchumi, hisa za Marekani zinaongezeka kwa asilimia 3 hadi 13 kwa mwaka. 