CREATE TABLE table_42417 ("Season" TEXT, "Series" TEXT, "Team" TEXT, "Races" FLOAT, "Wins" FLOAT, "Poles" FLOAT, "Podiums" FLOAT, "Points" TEXT, "Position" TEXT)

What season was the Formula BMW USA in?
SELECT "Season" FROM table_42417 WHERE "Series" = 'formula bmw usa'
SELECT "Season" FROM "table_42417" WHERE "Series" = 'formula bmw usa'