There is a concomitant increase in the number of experienced staff who will be retiring in the next four years, in particular at the D-1 and higher levels, with over 40 per cent of this group retiring by 2012.
有经验的工作人员也随之增加，他们将在4年内退休，尤其是D-1和以上职等的工作人员，这类人员中的40％以上将在2012年之前退休。