How to display % in Y-axis for a waterfall chart in DS1.6

Hi,

I have a requirement for showing percentages using a waterfall chart stacking up to 100%. But when I use it in design studio I am not able to show percentages in Y-axis lables. Is that possible ? if so how ? I tried checking different options with in the additional properties but wasnt able to figure out.I searched online but coudn't find anything.

Thanks,

Rajesh