Thomas T. Mackie & Richard Rose 
International Almanac of Electoral History [PDF ebook] 

The International Almanac is the only up to date source for the history of election results in the Western world from their origins to the present. It provides clear and authoritative information for 25 different countries, ranging alphabetically from Australia to the USA, and geographically across four continents, including Japan and new Mediterranean democracies as well as old Anglo-American and Scandinavian democracies. Each chapter gives a comprehensive list of all parties that have contested one or more elections, its vote at each election and percentage share of the poll, and the number of seats won in the national assembly. The results have been checked from original sources in more than 15 languages. The new edition of the Almanac brings election results up to date and incorporates fresh materials from historical research, while retaining the features that have made the volume the authoritative book on elections.