The provided charts illustrate the different types of courses, which were followed by the students during the years of 1984, 1994 and 2004.
Overall, it is clear that the percentage of face-to-face courses followed by students in 1984 was the highest, but the percentages of online courses followed by students in 1994 and in 2004 were the smallest. Additionally, the percentage of correspondence courses followed by students did not change, remaining in 1994 and in 2004.
Looking at the given charts, in 1984, the percentage of face-to-face courses followed by students was the highest at 67%, but the percentage of mixed media courses followed by students was the smallest at 13%. Additionally, the second position belonged to the percentage of correspondence courses followed by students at 20%.
In addition, the percentages of face-to-face courses followed by students did not change, remaining at 54% in 1994 and in 2004. Similarly, the percentage correspondence courses followed by students remained the same at 20% in 1994 and in 2004. Meanwhile, the percentages of multimedia courses and online courses followed by students remained unchanged, remaining at 20% and 11% in 1994 and 2004, respectively.