Table: hk_districts
Columns: district
population_2006_est
area_km
density_km
median_monthly_per_capita_labour_force_income_hkd

Question: Name the total number of median income for population 2006 for 365540
SQL: SELECT COUNT("median_monthly_per_capita_labour_force_income_hkd") FROM hk_districts WHERE "population_2006_est" = 365540