Dirt tax question

Hello,

I just received my tax assessment for 2006 (form 11) and appear to have been taxed correctly (20%) on the interest I earned. However, I'm confused about an item on panel 6, where it appears I have been charged an extra 2% on my gross interest. Does anyone know what this tax refers to?

Many thanks

Don't have acccess to the form right now, but I'd hazard a guess that it's the 2% health levy?