Claim: The highest MAE % in the Gampaha Electoral District and Sri Lanka was in  1989  wherein the United People's Freedom Alliance (founded by Sri Lankan President Maithripala Sirisena in 2019 and still exists now), while the lowest MAE % recorded was in the 2005 Gampaha Electoral District and Sri Lanka election.
Evidence: The United People's Freedom Alliance (abbreviated UPFA; Sinhala: එක්සත් ජනතා නිදහස් සන්ධානය Eksath Janathā Nidahas Sandānaya; Tamil: ஐக்கிய மக்கள் சுதந்திரக் கூட்டணி) was a political alliance in Sri Lanka founded by former Sri Lankan president Chandrika Kumaratunga in 2004 and dissolved by former Sri Lankan President Maithripala Sirisena in 2019.