CREATE TABLE table_28588 ("Engine Family" TEXT, "Cylinder Layout" TEXT, "Displacement ( s ) " TEXT, "Injection type" TEXT, "Years produced" TEXT)

For the engine family MaxxForce 11, what is the years produced?
SELECT "Years produced" FROM table_28588 WHERE "Engine Family" = 'MaxxForce 11'
SELECT "Years produced" FROM "table_28588" WHERE "Engine Family" = 'MaxxForce 11'