As a canadian, sekio is narrowed down to .509% of the people in this world.

33,098,932    =  x
6,500,000,000   100

3,309,893,200 = 6.5x10^9x
6.5x10^9        6.5x10^9

x =.509% 

Or, since we know sekio is 14, we can break this down some more:

Canada: Ages 0-14 = 17.6% (male 2,992,811/female 2,848,288)

2,992,811  =  x
33,098,932   100

2,992,81100 = 33,098,932x
33,098,932    33,098,932

x = 9.04

We now know that males ages 0-14 make up 9.04% of canada. We can now figure out what % of the world population that is:

2,992,811     =  x
6,500,000,000   100

2,992,81100 = 6.5x10^9x
6.5x10^9      6.5x10^9

x = .046%

We now know that sekio can only be .046% of the worlds population.

We also know that .3% of the canadian population has AIDS, so the chance that sekio has aids is .0271%.

Original statistics curtosy of: https://www.cia.gov/cia/publications/factbook/geos/ca.html

Please note that the first two equations were not needed to figure sekio's percent of the world.