A fact? Which fact are you referring too? Once again, where are you getting this information - and, if I might ask, what ethnicity are you?
What happened to the ancient Greeks then, they just disappeared? Man look at ethinic Albanians and Greeks and there are obvious differences. Plus your mathematics seem to be off quite a bit. If we are pretty much just Albanian's today, would you not say that the percentage of the population would be significantly higher than 5 %?
Consistency, consistency ; )