The graph illustrates the proportions of adults online using various social networking sites, according to a survey in the United States between 2012 and 2015.
Generally speaking, the trend in the proportion of adults using the websites is upward, with a faster increase for Instagram and
Pinterest than the others, including Facebook, the most popular website overall. While there was a small rise in the proportion of online adults using the latter, from 67% to 72% over the period, in. the last three years the trend was flat. By contrast, the proportion of the usage of Instagram jumped more than twofold from 13% in 2012 to 28% in 2015. A similar pattern was seen at the Pinterest site where the proportion of adult users went up more than 100% from 15% to 31%.
