How much oil does the United States of America export to other countries each year?

Why wouldn't it make sense for the United States to simply outlaw the exportation of fossil fuels to other countries like China and Mexico?How much oil does the United States of America export to other countries each year?
I dont know how much we export. But I can tell you why we export oil. US oil from some fields is exported because we simply dont have the refineries to refine the heavy crude that is located in the US. This type of crude oil takes special oil refineries to filter out the impurities. We dont have these refineries in the US because we have not built a refinery in 30 years and we have lost over half of our refineries in the last 15 years due to the fact they were not maintained and most blew up. As a result we dont have the refining capacity or the special tech required to refine low grade heavy crude oils. So we export it to countries that are willing to build those refineries and have passed the US on a tech scale.