<prompt> Translate the following text to EnglishUtabiri wa nguvu za kazi unaonyesha dhana za kati za Wadhamini wa OASDI za 2001, pamoja na zile za uzazi, uhamiaji, na ushiriki wa nguvu za kazi.  <response>: The labor force projection reflects the OASDI Trustees 2001 intermediate assumptions, including those for fertility, immigration, and labor force participation. 