The pie charts provide information on the preferences of leisisure activities amongst teenagers measured between two specific years, namely 1985 and 2015.
Overall, it is evident that watching movies rémains the most popular activity over the 30-yearperiod, while visiting the library held the position for being the least favourable in both instances.There was a change in popularity for both arcade games and bowling.(最牛逼的，最菜的，大趋势)
In1985, over a third of the youth enjoyed bowling at 36.7%, which dropped by more than10 percent in 2015 to 22%.（细节是多少，怎么改变）Arcade games also decreased in interest amongst teenagers where as spending time in parks became more and more popular over the years.
(一个对比)