  
<prompt> Oke ọnwụ ụmụaka maka ụmụaka ekpughepuru n'egwu nke ọnwụ | Oke ọnwụ ụmụaka maka ụmụaka ekpughepuru n'egwu nke ọnwụ | (Nwa ọhụrụ, 1990, 21.4) (Ka amụchara nwa ọhụrụ, 1990, 12.4) (Ụmụ ntakịrị, 1990, 33.8) (Nwata, 1990, 5.1) (Erughi afọ ise, 1990, 38.8) (Nwa ọhụrụ, 1997, 19) (Ka amụchara nwa ọhụrụ, 1997, 9.6) (Ụmụ ntakịrị, 1997, 28.5) (Nwata, 1997, 5.9) (Erughi afọ ise, 1997, 34.2) (Nwa ọhụrụ, 2002, 15.5) (Ka amụchara nwa ọhụrụ, 2002, 6.6) (Ụmụ ntakịrị, 2002, 22.1) (Nwata, 2002, 5) (Erughi afọ ise, 2002, 27) (Nwa ọhụrụ, 2007, 13.6) (Ka amụchara nwa ọhụrụ, 2007, 5.7) (Ụmụ ntakịrị, 2007, 19.3) (Nwata, 2007, 2) (Erughi afọ ise, 2007, 21.3) (Nwa ọhụrụ, 2009, 15.4) (Ka amụchara nwa ọhụrụ, 2009, 7.7) (Ụmụ ntakịrị, 2009, 23.1) (Nwata, 2009, 5.1) (Erughi afọ ise, 2009, 28.1) (Nwa ọhụrụ, 2012, 13.7) (Ka amụchara nwa ọhụrụ, 2012, 3.5) (Ụmụ ntakịrị, 2012, 17.2) (Nwata, 2012, 3.8) (Erughi afọ ise, 2012, 21) <response> Oke ọnwụ ụmụaka na eme n'egwu ahụike nke ọnwụ n'etiti ụmụ ntakịrị dị elu n'etiti 1990 na 2002, site na ụmụ ntakịrị ruo ụmụ ntakịrị.  