What percentage of consumers regularly or occasionally go online to conduct research before making an in-store purchase?

developed countries - majority, developing countries, it is limited to only cities & towns

A majority of consumers in developed countries do research online before buying as per latest studies and research. 

I do it regularly before finalising any big purchases 

developed countries - majority, developing countries, it is limited to only cities & towns with interet connection...rest everywhere its word of mouth and peers :)