It is requested to the candidates belong to AJK / GB /FATA to share their Reference number mentioned at interview call letter along with the Page number in order to have more clearer picture. I presume the page no of JIO candidate belong to GB / FATA would bear around total number of candidates called for interview.
And the reference number of candidates belong to following quota would carry around total number for that category of posts:

DD: GB / FATA
AD: AJK
JIO: GB / FATA

Regards