The unique problem facing Japan's broadband situation is due to the popularity of high-speed FTTP. Operators struggle to maintain enough bandwidth to allow maximum usage of the service by customers. Even the largest operators have capacities in the region of tens of gigabits while customers with 1 gigabit FTTP services (or higher) may number in the thousands. This problem is further compounded by limits caused by internal router bandwidth. Estimates of traffic based on data collected in May 2007 by the Ministry of Internal Affairs and Communications set total network usage at approximately 720 Gbit/s combined. The report further states that by May 2008, total traffic will exceed 1 Tbit/s.