Calculations: Only 3% population Employable by University System

In Any country let suppose literacy rate is 80% among adults population.
Out of 80% population how many did pass 10 th class Exam.
Some may have dropped to due poverty or just because not able to clear.
Look at realistic percentage:
 1. Let say 70% of them managed to clear 10th Exam: 80-(80*.3)=56
As average state board results are in 70% range.
 2. Then Those who go for 12th : result say 90%. and 10 % dropout.
 56-(56 * 0.2) = 45 %. 12 th pass.
3. How many graduate pass ultimately?
Take case of india out of 225 university and 50 IIT or 20 IIM. only top 25% university are good enough for employability. Let suppose only top 25 % student from every indian university get into real employment.
out of 45%= 45 – (3/4 * 45) = 12 % around. This is supposing all university are Equal and pitching all of its students, all courses stream, Arts , sociology, history, Engineering and management gets into Employment.
Which is not a case in any Economy since Every economy has its key sectors depending on resource availability of country, then geo-physical factors, other environmental factors.
Like China is base to manufacturing because of low labour rate.
India did well in BPO because of english skills.
Ireland has huge potential for data centres between Europe and USA so also has for milk exports.
So there are 200 skills but 100 are more important for employment. I am taking a very large figure though actual will be small. Let say 1/2 chances.
So there is  1/2* 12= 6% of all adult population.

Now % of Adult employable population not retired. Let say 50%.
So Actual is 6% * 1/2 = 3% Employable population by University System.
Note: There may be difference in probability I have assumed from country to country
So real percentage my be 3% or 6% but it would be nearby % only.
In  DEVELOPED world Calculations are little Different SO FIGURE WOULD DIFFERENT