These are the numbers NLC is assigning to writers whose initial publications appear in 2004 or later. It will be noticed that this range is analogous to the 1914-1967 range, there being an increase by 100 numbers (so that '6' takes the place of '5' in each case). For ex.: "Anonymous" is PS8500 (1914-1967) and PS8600 (2004-).

More can be found at A Classification for Canadian Literature, 3rd ed. (.pdf).