Can I display the "total" on a stacked column chart?

[RSunday]

I have a chart showing three technologies development over the years.
Together the three technologies represent the entire market and I would like
to display that total on top of the stacked column for each year.

How is that done?

I use PP2003.

 

[Echo S]

Here's how you do it in Excel:

http://www.andypope.info/charts/StackColTotal.htm

You can do something similar in PowerPoint, but you'd have to add up the
columns/data manually, of course.