The three pie charts illustrate the proportions of people from different age groups who used Facebook, YouTube, and Twitter in Australia in 2011.
Overall, it is clear that adults aged 25-34 were the dominant users on all three platforms, while the youngest (10-17) and oldest (over 55) age groups accounted for the smallest proportions. Another noticeable feature is that Twitter had a much higher share of users aged over 45, compared with Facebook and YouTube.
Looking more closely, the 25-34 age group made up the largest share of users on Facebook (29%) and YouTube (30%), followed by those aged 35-44, who represented roughly 28% and 26% respectively. In contrast, younger users aged 10-17 and 18-24 were relatively less common, accounting for only 10-19% across both platforms.
For Twitter, the trend differed slightly. The 25-34 group remained substantial at 29%, but the 45-54 age group formed the largest segment at 40%, far exceeding the same group on Facebook or YouTube. Meanwhile, only 4% of Twitter users were aged 10-17, and 18% were in the 18-24 bracket, showing that Twitter was less popular among younger people.
In summary, while Facebook and YouTube were dominated by young to middle-aged adults, Twitter attracted a considerably older user base in Australia in 2011.