) ▁performed , ▁and ▁financial ▁information ▁collected ▁under ▁Ott oman ▁Bank ▁for ▁the ▁purpose ▁of ▁pay ments ▁on ▁Ott oman ▁public ▁deb t . ▁ ▁One ▁of ▁the ▁At at ür k ' s ▁major ▁achiev ement ▁is ▁establishment ▁of ▁a ▁principal ▁government ▁institution ▁in ▁charge ▁of ▁statistics ▁( e conom ic ▁and ▁financial ▁statistical ▁data ) ▁and ▁census ▁data . ▁ ▁Modern ▁statistical ▁services ▁began ▁with ▁the ▁establishment ▁of ▁The ▁Central ▁Statist ical ▁Department ▁in ▁ 1 9 2 6 . ▁It ▁was ▁established ▁as ▁a ▁partially - central ized ▁system . ▁Turkish ▁Statist ical ▁Institute ▁is ▁the ▁Turkish ▁government ▁ag ency ▁commission ed ▁with ▁producing ▁official ▁statistics ▁on ▁Turkey , ▁its ▁population , ▁resources , ▁economy , ▁society , ▁and ▁culture . ▁It ▁was ▁founded ▁in ▁ 1 9 2 6 ▁and ▁has ▁its ▁headquarters ▁in ▁An k ara . ▁▁ ▁In ▁ 1 9 3 0 , ▁the ▁title ▁of ▁the ▁Department ▁was ▁changed ▁to ▁The ▁General ▁Director ate ▁of ▁Statistics ▁( G DS ), ▁and ▁The ▁National ▁Statist ical ▁System ▁was ▁changed ▁to ▁a ▁central ized ▁system . ▁In ▁earlier ▁years , ▁statistical ▁sources ▁were ▁relatively ▁simple ▁and ▁data ▁collection ▁was ▁conf ined ▁to ▁activities ▁related ▁to ▁some ▁of ▁the ▁relevant ▁functions ▁of ▁the ▁government ▁with ▁population ▁cens uses ▁every ▁five ▁years , ▁and ▁with ▁agricult ure ▁and ▁industry ▁cens uses ▁every ▁ten ▁years . ▁ ▁Grad ually ▁the ▁activities ▁of ▁the ▁G DS ▁w iden ed ▁in ▁accord ance ▁with ▁the ▁increasing ▁demand ▁for ▁new ▁statistical ▁data ▁and