The pie charts depict the proportion of time used for different activities in the office in the US in 1980 and 2000.
Overall, it can be seen that at the beginning of the period, phone recorded the highest figure, while computer stood at the lowest. In the final year, computer use increased dramatically and reached the largest percentage, whereas meeting had the least.
In detail, in 1980, phone recorded the highest figure, accounting for 30%, after that it decreased significantly to 17% in 2000. Additionally, the share of paper document accounted for 20% in 1980; and there was a gradual decline to 10% in 2000. In 1980, the proportion of meeting was 19%, after twenty years it fell consistently to 6%.
In contrast, the rate of computer stood at the lowest with 2%, however there was a dramatic growth to 30%, reaching the largest. Moreover, the percentages of the other activities and face-to-face communication accounted for 15% and 14% in 1980 respectively. Both categories: the other activities and face-to-face communication remained unchanged with 15% and 14% respectively in 2000. Furthermore, email was not present in 1980; but appeared in 2000, accounting for 8%.