<prompt> Translate the following text to EnglishMakadirio ya kati, ambayo yanaonyesha makadirio bora ya Wadhamini, yanaonyesha mabadiliko katika idadi ya watu wenye umri wa kufanya kazi, haswa kiwango cha kuongezeka kwa kustaafu kwa kizazi cha baby boom baada ya 2010.  <response>: The intermediate projections, which reflect the Trustees best estimate, reflect changes in the working age population, particularly the increasing rate of retirement by the baby boom generation after 2010. 