According to the data, the export of the Saudi Arabia's oil decreased by 1.17 percent to 6.924 barrels per day, compared to the previous month. Meanwhile, JODI did not provide any data on the Russian oil export in May.
Moscow has been ahead of Riyadh in crude production since the beginning of the year.
In late 2016, Organization of the Petroleum Exporting Countries (OPEC) member states, including Saudi Arabia signed an agreement in Vienna on limiting oil production by 1.2 million barrels per day to 32.5 million barrels per day for the whole cartel and 11 non-OPEC countries decided to jointly cut oil output by 558,000 barrels per day with Russia cutting the output by 300,000 barrels per day. The measure came to boost oil prices and is expected to stay in effect until 2018.