CREATE TABLE table_74377 ("Rk" FLOAT, "Name" TEXT, "Country" TEXT, "Matches Played" FLOAT, "Matches Won" FLOAT, "Points" FLOAT, "Prize Money  ( USD ) " FLOAT)

how many countries had 21 points
SELECT COUNT("Country") FROM table_74377 WHERE "Points" = '21'
SELECT COUNT("Country") FROM "table_74377" WHERE "Points" = '21'