According to Human Rights Watch:

"during the Anfal campaign from February to September 1988, Iraqi troops swept through the highlands of Iraqi Kurdistan rounding up everyone who remained in government-declared "prohibited zones." Some 100,000 Kurds, mostly men and boys, were trucked to remote sites and executed. Only seven are known to have escaped."

Thats about 12,500 per month for those 8 months.

100,000 divided by 265 would 377 years.