Weeknumbers in header


In grafana I made a table for the capacity of our machines. (no time-table)
With the machines from top to down, and the weeks from left to right.
Now I just can’t manage to get the correct ISO week numbers in the header.
I now have in the formula: “field as ‘W1’” for the data of the current week, but here I would like to have W33.
I have tried to make a fromula, and edit the JSON, but nothing worked.

does anyone know how I can get this done?
Thank you,