The given pie charts illustrate the popularity of a variety of classes among students from 1984 to 2004.
Overall, face-to-face courses had the highest proportion in all three periods, while the other categories remained stable. In addition, after 1984, online courses were also recorded, but they comprised the least proportion of students during the 10-year period.
In 1984, in-person classes accounted for a major proportion of 67 percent, while correspondence and mixed media categories represented 20 percent and 13 percent, respectively. Therefore, it showed that face-to-face classes were preferable to the other types of courses at that time.
In the two remaining periods, students still prioritized courses providing direct lectures, with over half of the total, despite the new appearance of online education. Regarding the correspondence category, its proportion remained unchanged at 20%, while that of combined media classes witnessed a relative rise of 2 percent in 1994 and then stabilized until 2004. However, virtual classes were still not popular among students at that time, comprising the least percentage of 11 percent during that time.
