<prompt> Translate the following text to EnglishKatika miongo miwili iliyopita, kiwango cha uzazi duniani kimepungua kwa watoto 1.5 kwa kila mwanamke na nchi zilizoendelea za viwanda zimeshuka chini ya kiwango cha kuzaliana cha watoto 2.1 kwa kila mwanamke.  <response>: In the past two decades, global fertility has dropped by 1.5 children per woman and industrialized nations have fallen below the 2.1 children-per-woman replacement rate. 