The pie charts illustrates change in proportion of various activities takes place in an office of the United States in 1980 and 2000.
Overall, out ofnthe six activities , computer increased significantly whereas , activites including phone, meetings and paper ducuments declined gradually. Additonally other activites and face to face communication remain unchanged. Moreover a new activity came in the office of the United States which was email.
At the outset, phone was the activity which shares more percentage in 1980 that was 30%, then within 20 years it plummeted to 14%, followed by paper documents and meetings that was 20% and 19% initially in 1980 then it decreased substantially to 10% and 9% respectively.
Conversely, computer is the only activity which rose rapidly from 2% to 30% ,that was a notable change over the coarse of 20 years. Other activites and face to face communication plateaued that is relatively 14% for face to face communication and 15% for other activities. Furthermore a new activity emerged in 2000 that was email which share 8%.