The four pie charts describe changes in the reasons for phone usage for teenagers in an African country from 2016 to 2019.
Overall, the priorities remained mostly the same throughout the four years, with social networks being the most frequent reason for using a phone. Additionally, the most drastic changes could be observed in the categories of social networks and phone calls.
Regarding the categories that saw the most changes in four years: social networks and phone calls, there existed a contrasting trend in the two reasons for using phones. In 2016, social networks, being the most common reason for the use of phones (50%), significantly outnumbered the 10% use of phone calls. A slight shift in the opposite direction with 13% using phones for calls and 48% for online socializing in 2017 was the only anomaly, from that year onward, the proportions for phone calls continuously fell and reached 5% in 2019, while social networks hit a record 56%, completely dominating the chart.
Meanwhile, the other categories, email and digital camera, remained mostly stable. The first year saw relatively similar percentages in these two categories, with 15% for digital camera and 25% for email. The consecutive two years followed in a similar manner. Finally, in 2019, the use for digital camera grew to surpass email, with 20% using phones for digital camera and 19% for email.