Qual foi o ano eleitoral médio que tem menos de 136 deputados e 1.560.753 votos recebidos?
CREATE TABLE table_name_86 (election_date INTEGER, number_of_deputies VARCHAR, number_of_votes_received VARCHAR)
SELECT AVG(election_date) FROM table_name_86 WHERE number_of_deputies < 136 AND number_of_votes_received = "1,560,753"