As far as I can ascertain... Western Sahara, Somalia, Oman, the Bahamas and Dominican Republic - are the only countries that do not collect income tax from their citizens.
There are zero countries in Kentucky. Kentucky is one state inside of a much larger country that is in the world.
Zero.
zero
ZERO
when net income is zero
Antartica has zero countries although parts of it are claimed by different countries.
Zero.
zero
zero
there is zero
zero
Hopefully zero.