Country

$$ ISOCode$2$ Name Capital Area Population PopDensity

LR Liberia Monrovia $372004818977129\mathrm{.}58$

UY Uruguay Montevideo $67600344929951\mathrm{.}04$

HR Croatia Zagreb $216004087843189\mathrm{.}2$

Complete the query to order all rows by PopDensity in ascending order. Write the most straightforward code.