Table schema:
CREATE TABLE table_name_33 (population_per_km²__2009_ INTEGER, province VARCHAR, area__km²_ VARCHAR)

Question: What is the highest Population per km² (2009) that is in western province, with an Area (km²) larger than 5,475?
SQL: SELECT MAX(population_per_km²__2009_) FROM table_name_33 WHERE province = "western province" AND area__km²_ > 5 OFFSET 475