Basically I think it's not so much that we would need more information. It would probably be a matter of doing more investigation as to how we would want to classify the occupations we already have into those that are truly STEM occupations and those that are not. There could be more investigation into what is truly a STEM occupation. Internationally there has been a certain amount of work on that, but it's not clear cut what is truly a science. For engineering it's fairly clear cut, but for scientific technology occupations, it isn't. There is no international definition of what those are, but as much as these things are hot topics, that's very much a hot topic.
On March 26th, 2015. See this statement in context.