country are, in order of population size, Kandahar , Herat , Mazar-i-Sharif , Kunduz , Jalalabad , Lashkar Gah , Taloqan , Puli Khumri , Khost , Ghazni , Sheberghan , Sar-e Pol , and Farah . Urban areas are experiencing rapid population growth following the return of over 5 million