What was the percentage increase in spending on international tourism from 2011 to 2012 of the country that spent $85.9 billion in 2011?
CREATE TABLE "international_tourism_expenditure" (
  "rank_2012" real,
  "country" text,
  "unwto_region" text,
  "international_tourism_expenditure_2011" text,
  "international_tourism_expenditure_2012" text,
  "pct_change" text
);
SELECT "pct_change" FROM "international_tourism_expenditure" WHERE "international_tourism_expenditure_2011"='$85.9 billion';