http://34reqsy6tqou6avwrkm23s4mpkrwz3drtq2e5yr7sywi76h7plnaahad.onion/articles/wikipedia.xhtml
Screw electricity, clothes or gas - you're sufficient in money if you can afford food, according to Wiki's and the gov's reasoning. Anyway, the chart shows that 54ng / ml is the amount that achieves all possible good effects (there could be some more not shown in this chart, and so the real needed amount might be even higher, but let's keep this simple for now) of vitamin D, and so is the actually sufficient amount according to a sane, non-arbitrary definition.