SELECT MAX(population_august_15), _2012 FROM table_12496904_1 WHERE population_density_2012__km_2__ = 307
Berapa populasi 15 Agustus 2012 ketika kepadatan populasi 2012 adalah 307?
CREATE TABLE table_12496904_1 (_2012 VARCHAR, population_august_15 INTEGER, population_density_2012__km_2__ VARCHAR)