Map of Portugal highlighting the gross rental yield for residential properties in each district: Castelo Branco has the highest yield at 9.4%. Santarém records between 7.5% and 7.9%. Coimbra ranges from 6.5% to 7.2%. Leiria shows values between 5.9% and 6.6%, Évora between 5.9% and 6.1%, and Setúbal between 5.9% and 6.2%. Braga is between 5.8% and 5.9%, Porto between 5.7% and 5.8%, and both Viseu and Aveiro between 5.3% and 5.5%. Faro presents between 5.1% and 5.4%, Funchal between 5.0% and 5.2%, Viana do Castelo between 4.9% and 5.2%, and Lisbon has the lowest yield, between 4.6% and 4.7%. The map uses colours or gradients to illustrate the different yield percentages, making it easy to visually compare the districts.