What is the maximum number of 2006 subscribers for Glo Mobile?
CREATE TABLE "current_situation" (
  "provider" text,
  "country" text,
  "subscribers_2005_thousands" real,
  "subscribers_2006_thousands" real,
  "growth_pct" text
);
SELECT MAX("subscribers_2006_thousands") FROM "current_situation" WHERE "provider"='Glo Mobile';