According to IPC's North American PCB Statistical Program, slow sales growth continued in December, bringing 2015 to a close at 0.4% growth over 2014. Book-to-bill ratio returned to parity at 1.00 in December. Total North American PCB shipments increased 0.6% in December 2015 compared to December 2014. Compared to previous month, PCB shipments were up 6.7%. PCB bookings rose 1.5% compared to December 2014, and year-to-date order growth in December was up 2.5% over 2014.