TAX Percentage in PDF

[mhu100]

I'm wondering if it's possible to show the TAX percentage for every product in the productlisting of the invoice (PDF)?
I want the customers to see in wich TAX group a product is (7% or 19%)

Now it looks like:
Product title | Reference | Qty | Total ex. VAT | etc etc.
Ipod......................1234.............1.............94.95

I want it to look like this:
Product title | Reference | Qty | Total ex. VAT | VAT | etc etc.
Ipod.....................1234.............1...............94.95....... 19%| etc etc.

Thanks in advance.