| 2015 | 2016 | 2017 | 2018 |
Production in millions of tons | 47.7 | 44.3 | 42 | 44.2 |
Share of oil GDP in total GDP | 23.8% | 18% | 18.4% | 20.4% |
Share of oil exports in total exports | 61.9% | 66.2% | 68.9% | 66.5% |
Share of oil revenues in budgetary revenues | 40.5% | 31.1% | 36% | 42.3% |