<prompt> Translate the following text to EnglishHata hivyo, mchoro wa 19 unaonyesha jinsi makadirio yetu ya idadi ya vifo vya mapema katika makadirio ya msingi yanaweza kubadilika chini ya safu ya dhana mbadala kwa kizingiti cha vifo vya PM.  <response>: Nonetheless, Exhibit 19 illustrates how our estimates of the number of premature mortalities in the Base Estimate might change under a range of alternative assumptions for a PM mortality threshold. 