It depends on the degree people go for. The education for hard sciences requires four foreign language credits. When you have four you mine as well take two more classes and pick up the minor. It really just depends on how much effort is require to pick it up. Three out of the 10 people in my french classes said they were getting the minor. In my art classes where only one foreign language is required for the degree the majority just do one degree and go to bachelors with it. It's more common for people to go to grad school there then it is for people to pick up minors. For those that just want to get out in as little time as required they just do the classes for their specific subject. Those are the people that plan to go to grad school and so forth. If people planning on getting their masters worked on a bunch of minors on the way up they would end up adding a year or two on to an already 5 to 6 year degree plan.