what row is the  population of Latin America/Caribbean when Asia is 4,894 (46.1%)?
CREATE TABLE "un_2012_estimates_and_medium_variant_pro" (
  "year" real,
  "world" real,
  "asia" text,
  "africa" text,
  "europe" text,
  "latin_america_caribbean" text,
  "northern_america" text,
  "oceania" text
);
SELECT COUNT("latin_america_caribbean") FROM "un_2012_estimates_and_medium_variant_pro" WHERE "asia"='4,894 (46.1%)';