<prompt> Translate the following text to EnglishKwa kukosekana kwa data inayoonyesha usambazaji wa uzito wa barua zinazoingia, Tume ilitumia, kama usambazaji wa proxy, data zilizotengenezwa na utawala wa posta wa Ulaya wakati wa kuandaa mfumo mpya wa ada ya terminal.  <response>: In the absence of data showing the weight distribution of inbound mail, the Commission employed, as a proxy distribution, data developed by European postal administrations in the course of preparing a new terminal dues system. 