@OptimisticCon Not correct. Another way to look at it, is that if this were rounding error exaggerated by small pop, there would be many of those small rural counties with unusual LOW levels (i.e. zero). You can combine 10 small counties to make it comparable. No difference in color generally.
@乐观主义并不正确。从另一个角度来看，如果这是小波普夸大的舍入误差，那么许多农村小县的水平会非常低（即零）。你可以将10个小县合并，使其具有可比性。颜色一般没有差别。