<prompt> Translate the following text to EnglishVikundi kadhaa vya usalama vya kati vilikuwa vimeendeleza vipimo vya shughuli zao wenyewe, matokeo, na utaalam kama dalili ya ufanisi wao.  <response>: Several of the central security groups had developed measures of their own activities, outputs, and expertise as an indication of their effectiveness. 