The graph illustrates the propotion of people who used different kind in social media platfotms in the USA over a three-year period from 2012 to 2015.
It can be seen that the figures of adults in social media usage increased over the period shown. Facebook remained the dominant choice in comparision with the others.
In 2012, the percentage of people who using Facebook was 67% and then this number increased steadily to 71% in 2013. The following year saw the quantities of Facebook’s users leveling off. By 2015, this number reached a peak at 72%, the highest score over a period.
In contrast, during the same the others social media had the same pattern. Both Pinterest and Instagram increased more than twice in it initial value from 15% to 31%, from 13% to 28%, respectively. While the figures for Linkedln and Twitter are increased slowly from 5% to 7%. Notably, after its initial from 16% in 2012 to 23% in 2014, Twitter saw no futher increase in popularity in the end of the period