Oil still drives many conflicts of today and thusly its production proves a critical factor to consider.
Oil is as critical to any war effort today as it was throughout both World Wars. Oil drives many facets of the modern military including vehicles and industry. For the purposes of the GFP ranking, oil consumption is applied as a bonus to each nation; the higher its production the better. Oil production is offset by oil consumption and and factored in conjunction with proven oil reserves.
The data presented below is through 2016. Presented in bbl/day (Barrels per Day).