The world's biggest oil exporter posted 174.9 billion riyals in oil revenues in the second quarter, down 5% when compared to the same period a year earlier, and non-oil revenues of 85.8 billion, 4% less than last year.

In the first half of the year, the kingdom posted an overall deficit of 5.68 billion riyals, according to data published by the Saudi ministry of finance on Tuesday.