Mgbe ihe karịrị afọ 200 nke mmepe gasịrị, ihe mgbagwoju anya nke taa enweelarị ọkọlọtọ, ma n'aka nke ọzọ, ọ nwere echiche na-akparaghị ókè.N'ihe gbasara isiokwu, ọ na-elekwasị anya na ọdịdị okike, ụlọ na ihe nkiri ụfọdụ.Enwere data statistical tupu nke ahụ kwuru na patte abụọ a na-ahụkarị ...
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