CREATE TABLE table_2562572_53 (largest_ethnic_group__2002_ VARCHAR, cyrillic_name VARCHAR)

What ethnic group had the largest population in in 2002?
SELECT largest_ethnic_group__2002_ FROM table_2562572_53 WHERE cyrillic_name = "Сурдук"
SELECT "largest_ethnic_group__2002_" FROM "table_2562572_53" WHERE "cyrillic_name" = "Сурдук"