alt Hacker NewsThat may or may not work depending on where you're at.
If for example you have poor compliance with the law then the law is mostly useless (in the US you do have to update your ID in 30 days, but huge numbers of people dont).
And that doesn't count if your country has a huge undocumented population, like some places in the US do.
Most countries don't extend citizenship to illegals. No driver license, no housing, no benefits. They are irrelevant to the statistics- it would be like counting squirrels.