So, this was asked a few years ago and was never answered, and that would have been an old version anyways, so I'm going to ask it again. According to the wiki, basic trade goods (besides infrastructure) should begin appearing on your colonies at 1 million population. However, I have a planet at near a million and a half, and nothing's changed. Was it changed at some point or is there some other factor that drives the creation, such as presence of minerals?
Edit: I'm using version 7. 0.