Assuming an Average Geothermal Heat Flux Of $$0.087 \mathrm {~W} / \mathrm { m } ^ { 2 } \text { and an average }$$

Assuming an average geothermal heat flux of $$0.087 \mathrm {~W} / \mathrm { m } ^ { 2 } \text { and an average }$$ $$\text { per capita power use of } 10 \mathrm {~kW} \text {, what is the maximum population density that could be }$$ accommodated if geothermal heat is used at an average efficiency of $50 \%$ to satisfy all primary energy requirements? Are there countries which (on the average) meet this condition? Give examples.