While your number seems like a lot, it's really just a drop in the bucket. The US consumes close to 8 billion barrels of oil annually. I was, however, surprised that it was still as high as 0.5%.
>You should know that oil is not used for elec. gen in developed countries.
Eh? When I worked for a United States generation company our coal-burning plants could and would be switched to bunker fuel if the price was right. To be fair it's not much (less than 5%) depending on how you slice it, but in their 2016 annual report [1] Dynegy reported 2.6 TWh (terawatt hours) sold into the wholesale market and .7 TWh into retail.
Be careful about blanket statements unless you're an expert in the area because other HN readers are experts.