What percentage Raggy - just taking the men 48%

But while you are on about percentages that would take up arms - here's the percentages for the Nationalists:

Easter week Rising - 1,250 out of a population of 3.1 million = 0.04%
Irish War of Independence - 15,000 out of a population of 3.1 million = 0.5%
Irish Civil War - 70,000 out of a population of about 2.1 million = 3.33%

So as far as winning Irelands freedom by force of arms the best effort the nationalists ever mustered was when they were fighting one another.