According to IPC's North American Printed Circuit Board Statistical Program, year-over-year sales and order growth continued in August and book-to-bill ratio climbed to 1.13, its highest level in more than 5 years. Total North American PCB shipments increased 1.5% in August 2015 compared to August 2014. Year-to-date shipment growth stood at -0.1, reflecting negative sales growth rates seen earlier this year. Compared to previous month, PCB shipments were up 3.6%.