<prompt> Translate the following text to EnglishIdadi hiyo iliongezeka tangu miaka ya 1990, wakati ambapo ukame mkubwa wa kazi kwa watengenezaji wa boilers ulisababisha watengenezaji wengi wa boilers kutafuta kazi nyingine.  <response>: These numbers are up from the 1990s when a severe drought of work for boilermakers caused many boilermakers to seek other lines of work. 