What is the percentage of Buddhist when the Population is ~2.6 million (2.6million)?
CREATE TABLE "demographics" (
  "area" text,
  "population" text,
  "pct_muslim" text,
  "pct_hindu" text,
  "pct_buddhist" text,
  "pct_other" text
);
SELECT "pct_buddhist" FROM "demographics" WHERE "population"='~2.6 million (2.6million)';