Bank Services, primarily consisting of cancelled check delivery, generated approximately 65%, 68% and 68% of AirNets total net revenues for the fiscal years ended December 31, 2006, 2005 and 2004, respectively. AirNets time-critical cancelled check delivery service allows its banking customers to reduce their float costs and related processing fees. AirNet also transports other items, such as proof of deposit transactions and interoffice mail, for many of the same bank customers. The U.S. banking industry, including commercial banks and third-party processors, represents AirNets largest category of customers. AirNets bank customers represent many of the nations largest bank holding companies