CREATE TABLE table_31341 ("Rank 2012" FLOAT, "Country" TEXT, "UNWTO Region" TEXT, "International tourism expenditure 2011" TEXT, "International tourism expenditure 2012" TEXT, "% change" TEXT)

How many countries spent $83.7 billion on international tourism in 2012?
SELECT COUNT("% change") FROM table_31341 WHERE "International tourism expenditure 2012" = '$83.7 billion'
SELECT COUNT("% change") FROM "table_31341" WHERE "International tourism expenditure 2012" = '$83.7 billion'