Wɔ afe 1960 mu no, na nkrofo dodoɔ a na wɔ wɔ Nkra Mantam no yɛ 491817. Nnipa dodoɔ a na wɔ wɔ hɔ wɔ afe 2000 mu no yɛ 2,905,76. Nnipa akenkan a ɛkɔɔ so wɔ afe 2010 no kyerɛ sɛ nnipa 4,10,054 na ɛwo nkran mantam.