<prompt> Translate the following text to EnglishKwa wastani, kila mwaka, barua za darasa la kwanza zinapotea kwa kiasi cha milioni 160 au chini ya asilimia 0.2 ya barua za darasa la kwanza.  <response>: These represent an average loss of 160 million pieces or less than 0.2 percent of First-Class Mail annually. 