SCHEMA:
CREATE TABLE table_name_66 (area_km_2 VARCHAR, census_ranking VARCHAR, population VARCHAR)
USER:
What is the total area with the Census Ranking of 3,129 of 5,008, and a Population larger than 460?

QUERY:
SELECT COUNT(area_km_2) FROM table_name_66 WHERE census_ranking = "3,129 of 5,008" AND population > 460