Help! How would I finsh this data table?

I am experimenting which metal rod would be the best conductor of heat by timing how long a drawing pin would take to fall off the end of a metal rod. We heat the rods up using a bunsen burner. I have my independent variable at the left which is my 'type of metal', out of Br, Iron, Steel, Aluminium and Copper. But how would I set the rest of the table out. Please help my work needs to be in for tomorrow.