What is the population density of the Capital Region of Denmark?
CREATE TABLE "table1_16278602_1" (
  "danish_name" text,
  "english_name" text,
  "seat_of_administration" text,
  "largest_city" text,
  "population_january_1_2008" real,
  "area_km" real,
  "pop_density_per_km" text
);
SELECT "pop_density_per_km" FROM "table1_16278602_1" WHERE "english_name"='Capital Region of Denmark';