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.