<prompt> Translate the following text to SwahiliThe teen-age fertility rate has been dropping for several decades--a tribute, no doubt, to contraception--though for most of that time the teen-age out-of-wedlock birth rate was increasing.  <response>: Kiwango cha uzazi wa matineja kimekuwa kikipungua kwa miongo kadhaa - kwa sababu, bila shaka, ya kuzuia mimba - ingawa kwa muda mwingi huo kiwango cha kuzaliwa kwa matineja nje ya ndoa kilikuwa kikiongezeka. 