http://www.hc-sc.gc.ca/ewh-semt/pubs/occup-travail/index_e.html#radiation

Provides an index to the annual reports of occupational exposure in Canada. This series of reports provides statistics on occupational radiation exposure of monitored workers in Canada. Previous issues of the report can obtained from the authors. The information is based on the data in the National Dose Registry (NDR) maintained by the Radiation Protection Bureau of Health Canada. Each document contains data from the previous 2 years. Reports are in PDF requiring Adobe Acrobat to view.