For this presentation, the national household survey data is an excellent source of information for national level data to look at information by occupation, gender, and field of study, which is why we were able to do that comparison of 2011 data to 1991 data. It's still a very rich source of data. It's very good quality, and it's excellent for this type of presentation.
On March 26th, 2015. See this statement in context.