Mexican airport operator Grupo Aeroportuario del Centro Norte, S.A.B. de C.V., known as OMA (OMAB) (BMV:OMA), reports that terminal passenger traffic at its 13 airports increased 22.9% in March 2015, as compared to March 2014. Domestic traffic increased 23.0%, and international traffic increased 22.6%. Of total March traffic, 97.7% was commercial aviation and 2.3% was general aviation. International traffic increased in nine airports in March. Traffic increased most significantly in Monterrey (+39.4%; +30,341 passengers), principally as a result of increased traffic on the Houston route. Domestic traffic increased in all thirteen airports in March. The most noteworthy increases were in Monterrey (+30.5%; +132,935 passengers), Acapulco (+36.6%; +17,188), Chihuahua (+24.0%; +15,591), and Tampico (+29.4% +13,828). Monterrey traffic increased principally on the Mexico City, Cancun, Bajio, and Villahermosa routes. Acapulco increased traffic on its Mexico City, Monterrey, and Tijuana routes. Chihuahua increased traffic on the Mexico City and Monterrey routes. Tampico increased traffic on the Mexico City, Monterrey, and Villahermosa routes.