The braille calendar Fifty Years of Service: The International Year of the Disabled Person, was published in 1981 by NLS to commemorate its fiftieth anniversary. Currently NLS produces braille materials for more than 43,000 braille-reading patrons. Annually more than 600 braille books are produced and distributed through the NLS national network of local braille-lending libraries. In 2009 NLS provides 32 braille magazines to more than 4,513 subscribers.