A key objective of the revised National Occupation Classification (NOC) developed in 2011 was to harmonize the coding structures and to eliminate all other differences between the NOC of Human Resources and Skills Development Canada 2006, and Statistics Canada’s NOC for Statistics 2006. Due to this structural realignment, occupational data for years 2006 and 2016 are not directly comparable. As a result, comparisons between 2016 and 2006 are limited to the “Population 15 years and over" only.