virtual users / # of users on stats components

while looking at http://www.loadui.org/Getting-results/g ... arted.html
one thing that would be hugely useful was overlaying #users in the report.

since the x-axis is the time. lets say from 9:00 - 12:00, it would be nice if the background somehow corresponded to the #users.
so for instance, the background from 9:00 - 9:30 could be green, 9:30-10:30 blue, 10:30-11:00 yellow. There would be a legend for green,blue,yellow corresponding to the different load level (green=10 vusers, blue = 50 vusers, etc)

Thanks

Ali