Answer:
OPEC. In 1960, Arab and Venezuelan oil producers got together and formed the Organization of Petroleum Exporting Countries (OPEC). They wanted a fair price for the oil they produced. Things went along well until 1973.
Oil embargo of 1973. In 1973, OPEC decided it would no longer ship oil to those countries supporting Israel in the Yom Kippur War. At the same time, OPEC members cut oil production, which automatically raised the price of oil. Overnight the price for a barrel of oil went from about $15 to just over $40. This caused shortages in gasoline and big price increases. The U.S. had to ration gasoline for a time, until other means of obtaining oil could be found.
so, 1973 is the answer
