Y-Axis with Absolute value

[gec]

High all,

I have a question about a custom number for the axis of a chart: is it possible to have negative values but have an absolute number on the y-axis?

Example, currently my distribution runs:
30%
20%
10%
0%
-10%
-20%
etc.

But, for the data I'm presenting this is not strictly accurate, and I'd prefer to have it run in both directions from 0% as positive values:
20%
10%
0%
10%
20%

Possible?
Any help is much appreciated.
Cheers

[shg]

Format the axis as 0%;0%

[gec]

Excellent, thanks heaps!