CREATE TABLE table_203_99 (id DECIMAL, "season" DECIMAL, "date" TEXT, "driver" TEXT, "team" TEXT, "chassis" TEXT, "engine" TEXT, "race distance\ laps" DECIMAL, "race distance\ miles  ( km ) " TEXT, "race time" TEXT, "average speed\ ( mph ) " DECIMAL, "report" TEXT)

which team won the champ car world series the year before rusport ?
SELECT "team" FROM table_203_99 WHERE "season" = (SELECT "season" FROM table_203_99 WHERE "team" = 'rusport') - 1
SELECT "team" FROM "table_203_99" WHERE "season" = (SELECT "season" FROM "table_203_99" WHERE "team" = 'rusport') - 1