How many radio stations were built in Asia?
CREATE TABLE "baha_i_social_and_economic_development_p" (
  "programs" text,
  "world" real,
  "africa" real,
  "americas" real,
  "asia" real,
  "australasia" real,
  "europe" real
);
SELECT "asia" FROM "baha_i_social_and_economic_development_p" WHERE "programs"='Radio Stations';