<prompt> Translate the following text to EnglishKwa mfano, idadi ya viwanda vya boiler vinavyohitaji vifaa vya upanuzi chini ya Sheria ya Clear Skies imesambazwa kwa usawa hadi mwaka 2010, wakati mahitaji yanaanza kupungua.  <response>: The number of boilermakers in demand for retrofit installations under the Clear Skies Act is spread fairly evenly out to 2010 when the demand begins to decrease. 