The provided line graph illustrates the results of a survey about usage of different websites by adults in the USA during 2012-2015, namely Facebook, Pinterest, Instagram, LinkedIn and Twitter.
The overall trend of all platforms during the given period was upward. As presented in the chart, the percentage of adults using Facebook was holding the top position throughout the timeframe. The most noticeable rise in popularity was observed for Pinterest and Instagram. In contrast, LinkedIn and Twitter were the least popular among the suggested social networks.
Turning to the details, Facebook usage constituted 67-72% between 2012 and 2015, with the most significant rise occurring in the first year, when the rate increased by approximately one twentieth. The popularity of Instagram and Pinterest, which were the lowest with the figures 13% and 15% in 2012, respectively, presented the highest progression by 15-16% by the end of the period in question.
The rate of adult users of LinkedIn and Twitter demonstrated a similar pattern. During the 2012-2014, both platforms experienced a gradual increase in usage from 20% to 28% for LinkedIn and from 16% to 23% for Twitter. However, in the last year, the trend reversed for LinkedIn , the figure for which dropped to 25% annually, whereas the percentage of Twitter users remained constant, with 23% in 2015.