Shipping methods

I have configured 4 different shipping methods .the details are
Postalcode weightrange country shippingrate deliverytime
0-999999 0to25kg usa $40.00 2days
0-999999 0to25kg usa $20.00 4days
0-999999 0to25kg usa $10.00 6days
0-999999 0to25kg usa free 8days

delivery timings for all are same. I want to display all 4 in the checkout By default only two are showing like cheapest and quickest shipping methods. How can i show all four shipping methods on checkout…?