<prompt> Translate the following text to SwahiliSome reviewers have also noted that the observed mortality associations from the 1980s and 90s may reflect higher pollution exposures from the 1950s to 1960s.  <response>: Wanachunguzaji wengine pia wamebainisha kwamba mashirika ya vifo yaliyoonekana kutoka miaka ya 1980 na 1990 yanaweza kutafakari juu ya maambukizi ya uchafuzi wa hewa kutoka miaka ya 1950 hadi 1960. 