From those top tens for females and males, five out of ten are countries with populations less than 12 million each. It would be interesting to see the US stati

From those top tens for females and males, five out of ten are countries with populations less than 12 million each. It would be interesting to see the US statistics by state. Smaller networks (small population of a country, or by state) could be a factor here. Could you find the original study?