The PSD's representation in the Brazilian Chamber of Deputies steadily shrunk from 52.8% of the seats in 1945 to 28.9% in 1962. By 1963, the Labour Party, PSD's minor opposition party, had more seats than the PSD.
The percentage of seats held by the PSD in the Brazilian Chamber of Deputies declined from 52.8% in 1945 to 28.9% in 1962. By 1963, the Labour Party surpassed the PSD in terms of seat representation.