This would be my ideal ranking. Using the 2008 year as an example

Select 6,1028,'High' union all

Select 2,924,'High' union all

Select 3,862,'Medium' union all

Select 4,724,'Medium' union all

Select 5,628,'Medium' union all

Select 1,569,'Low' union all

Select 7,488,'Low' union all

Select 8,321,'Low' union all

Select 9,284,'Low' union all

Select 10,161,'Low'

In this case it breaks down to 32.5% high, 36.9% medium, 30.4% low.