The reviewer comments states that
’Rejected submission since not all required data is available. Data available (http://www.ine.mx/archivos2/portal/Elecciones/PEF/2014-2015/#resultados) include results for major electoral contests, registered votes and invalid votes, but no information on spoiled ballots. Data is up to date, available in HTML and CSV, downloadable at once for each election. Historical data also available: http://www.ine.mx/archivos3/portal/historico/contenido/Historico_de_Resultados_Electorales/’
In this sense I would like to clarify that the normative translation for ‘spoiled ballots’ to Mexico is 'Voto Nulo (More info on the treatment of spoiled ballots in Mexico here: http://www.ine.mx/docs/IFE-v2/DECEYEC/DECEYEC-MaterialesLectura/docs/03_VotoNulo.pdf).
In this regard the two links provided with electoral information provide data on ‘Voto Nulo’, and the cases in which the electoral authority can determine a vote as invalid: eg. vote for two or more candidates, votes for no candidate, ballot is mutilated or incomplete,
Also in the National Electoral Information System, once a search by district is done, users can find an ‘observations’ column, which states the unique ID of Challenges to specific ballot stations.