Equal Bandwidth Shaping

Hello,

I would like to build a bandwidth shaping policy that allows equal access for all users, but at the same time allowing 1 user full bandwidth if no-one else is online.  I'm not trying to shape based on source, destination, URL, or Application - just fair bandwidth for each host.  For Example, I have 10Mb upload capability (with a 1GB Ethernet link between the Fortigate and ISP router in case that makes a difference) and I want everyone to have equal access - if 100 users are each sending data then each is given 100Kb of bandwidth.  What I'm seeing right now is 1 host can take a majority of the bandwidth and cause latency problems for other hosts.

Thanks, Jeff