Based on the information given on the subject of the proportion of candidates, by activity over the course of 20 years, an overall positive trend is obviously seen in the majority of cases. Another striking feature of this graph proves to be sporadic convergences. In very few cases, a relative plateau was followed.
Unlike other graphs, film club as well as Martial arts had almost been constant in their figures since the first year of the record. The most remarkable increase had been dedicated to table tennis since 2010 although no impressive shift was seen regarding that before then. On the other hand, amateur dramatics manifests a sharply distinct picture. To elaborate further, it had gone through by far the sharpest decline reaching below 10 since 2005 despite having had very little rise prior to that time. In contrast to other cases, musical performances have never held any decline.
To conclude, amateur dramatics was literally the only item which reduced sharply in the end. Others rose either sharply or slightly at last.