CREATE TABLE table_204_291 (id DECIMAL, "rank" DECIMAL, "name" TEXT, "nation" TEXT, "cp" DECIMAL, "fp" DECIMAL, "points" DECIMAL, "placings" DECIMAL)

how many times does the unites states appear in the nations column ?
SELECT COUNT(*) FROM table_204_291 WHERE "nation" = 'united states'
SELECT COUNT(*) FROM "table_204_291" WHERE "nation" = 'united states'