CREATE TABLE table_20639 ("Danish name" TEXT, "English name" TEXT, "Seat of administration" TEXT, "Largest city" TEXT, "Population  ( January 1 ,  2008 ) " FLOAT, "Area  ( km\\u00b2 ) " FLOAT, "Pop. density  ( per km\\u00b2 ) " TEXT)

What is the population density of the Capital Region of Denmark?
SELECT "Pop. density (per km\u00b2)" FROM table_20639 WHERE "English name" = 'Capital Region of Denmark'
SELECT "Pop. density (per km\u00b2)" FROM "table_20639" WHERE "English name" = 'Capital Region of Denmark'