If the country publishes the election (voting) results online, are historical results also available?

Historical data for municipal, parliamentary, regional council, and presidential elections organized by constituency can be found here, as spreadsheets available for download. 

Aggregate historical overviews of results for municipal, parliamentary, regional council, and presidential elections can be found here, utilizing an online infographic tool. Results can be studied at the national level, as well as the level of constituencies, regions, and communities.