The loss was 35.9 billion pesos ($2.75 billion) in the first quarter, up from 4.33 billion pesos in the same period one year earlier.
Crude output averaged 2.49 million barrels per day, down 2.1% from the first quarter of 2013.
Crude export volumes were down, by 1.1%, averaging 1.19 million barrels per day for the quarter, and overall revenue was $6.8 billion lower.
The
