Until 2009 , this supplementary segment comprised 15,000 persons ; since 2010 , it has comprised 21,000 persons .
Since 2003 , the SLFS has also been supplemented with foreign nationals in the permanent resident population selected from the Central Migration Information System ( CEMIS ) .
Until 2009 , this supplementary segment comprised 15,000 persons ; since 2010 , SLFS has comprised 21,000 persons .
Since 2003 , the SLFS has also been supplemented with foreign nationals in the permanent resident population selected from the Central Migration Information System ( CEMIS ) .