loop in Smart forms

Dear ABAPer`S

I wrote a loop in smart forms expected output is

10

20 (two record) but instead printing two record it only print 20

so  I need some  guidance

loop at IT2_EsLL.

     READ TABLE it2_esll with key packno = IT_EsLL1-sub_packno.

       VAR_SERVICE_LINE = it2_esll-EXTROW.

      ENDLOOP.