- The document presents voter turnout data for national and local elections in Portugal between 1975-2011, including numbers of registered voters, actual voters, abstentions, blank votes, and null votes. - Overall, voter turnout for national elections declined over time, from over 80% in the 1970s-80s to around 60% in the 2000s. Turnout for local elections in the district of Porto followed a similar trend. - Abstention rates increased correspondingly from under 20% in the 1970s to around 40% for national elections and 35-37% for Porto district elections by the 2000s.