Ok.
DV2014:
According LPR stats of fiscal years 2008-2012 we have a split between low-admission and high-admission regions of 0.186:0.814. These numbers are reversed for the DV program, so low-admission regions get 81.4% of all visas, AS and SA share 18.6%.
Population proportions in the low-admission class are AF:EU:OC = 1090m:830m:38m (I left out Bahamas), which add up to a total of 1958m.
So the quotas would be approx. 1090/1958*81.4% = 45.3% for AF, 34.5% for EU and 1.6% for OC. Taking 53k visas issued this would mean 24k for AF, 18.3k for EU and 840 visas for OC. Note quite agreeing with your spreadsheet, unless there is a massive flood for AF in the next few weeks (and a complete stop for EU).
Since I just wanted to have a rough idea of the (european) scale, I wasn't too scrupulous to the details (e.g. ignoring dependent territories for EU, but not for OC!). It's also a very tedious task to rearrange the statistical tables to match the definition of the different regions in 203(c), which is quite different to the usual LPR statistics, where Mexico is belonging to North America, for instance. The same goes for population stats, especially for EU.
DV2015:
Nigeria accounts for some 170m in population, so the quotas (including a small shift in LPR statistics in FYs 2009-2013) are 920/1788*81.1% = 41.7% for AF, 37.6% for EU and 1.7% for OC.
But honestely, I'm not quite sure whether DoS is working the same numbers.