Puerto Vallarta, Mexico - Petroleos Mexicanos (Pemex) said Tuesday it posted a trade surplus of $24.99 billion in 2011, up 28 percent from the prior year. Exports totaled $55.79 billion, while imports came in at slightly more than $30.8 billion, the state-owned oil giant said in a preliminary statistical report on its performance last year.

According to the report, sales of Mexican petroleum and derivatives grew by $15 billion in 2011, compared to the prior year, an increase of 36 percent. Subsidiary PMI Comercio Internacional sold 1.33 million barrels per day (bpd) at an average price of $101 per barrel to customers in the Americas, Europe, and Asia.

Also, a total of 185,000 bpd of fuel oil, gasoline, diesel, and other petroleum products worth $6.21 billion, or 30 percent more than in 2010, were sold on the international market last year. Petrochemical exports totaled $260 million, while imports of petrochemical raw materials came in at $125 million.

Pemex, Latin America’s largest corporation and the world’s third-largest oil producer, has a monopoly over the Mexican petroleum industry. The state-owned corporation is the biggest source of revenue for the Mexican Treasury.